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57 Chevy Bel Air 2-door (new to me) – mechanical & electrical work

7667 Views 97 Replies 17 Participants Last post by  G-man57
Last year I bought a 1957 Chevy BelAir 2-door sedan (post).
I always liked the look and lines of the 57 and I think it looks sleek just standing still.
Also been an old time Chevy guy. (gotta love the small block V-8).

Cosmetically the car looked great and ran pretty well when I test drove it. But after buying the car I started to realize that the previous owner cared more about how the car looked, than how well it functioned or how reliable it was. So I ended up with quite a few projects. Therefore, I thought I would start a project thread.

I wasn’t looking a show car, but I wanted a car that would be reliable and functional.

Here is a photo on the day I brought it home.

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The previous owner told me that the engine was a 1967 Chevy small block and the 4-speed manual transmission was a T-10. Also in his ad, the previous owner listed the rear end gears as 3:83. Well it turns out the previous owner was incorrect on a few things.

After getting the numbers off the engine block and the transmission . . . . and doing a little research (thank goodness for the internet) . . . . . I determined the engine is a 1973 Chevy 350 c.i. small block from a pickup truck and the transmission is a 1976 Borg-Warner Super T-10 (aluminum case). The bell housing appears to be from a 1970 Chevy pickup.

I also determined the rear end gears were 3:73
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G-man, sorry to hear about your eyes. Glad to hear you recovered and healed. Thanks for giving the heads up to other members.
g-man. I ran into this very issue with my sons 57. My boards were horrendous and there were a lot of other issues that had to be fixed. My son’s car not quite so bad but in the helm of what yours look like. At first glance I thought I could make the repairs with new braces, some new pans and all would be good. But each time I started to cut or weld I was blowing holes through everything because of how thin the metal was in the floor boards. My longtime friend had encouraged me to replace the entire floor from the get go but I resisted. I could fix it, I was sure. In the end, he was right, we surrendered and got an entire floor. Under 1000 with braces and inner rockers already attached. it was a little work don’t get me wrong, but we ended up with a way better result.

just food for thought.
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g-man. I ran into this very issue with my sons 57. My boards were horrendous and there were a lot of other issues that had to be fixed. My son’s car not quite so bad but in the helm of what yours look like. At first glance I thought I could make the repairs with new braces, some new pans and all would be good. But each time I started to cut or weld I was blowing holes through everything because of how thin the metal was in the floor boards. My longtime friend had encouraged me to replace the entire floor from the get go but I resisted. I could fix it, I was sure. In the end, he was right, we surrendered and got an entire floor. Under 1000 with braces and inner rockers already attached. it was a little work don’t get me wrong, but we ended up with a way better result.

just food for thought.
Because the center transmission / driveshaft tunnel was in good shape and VERY SOLID . . . . I didn't see the need to cut out good metal and the entire floor pan. Besides, current trucking costs for a full floor pan would probably be very expensive.

Initially I was going to buy a full half floor pan for each side.

When I went to buy the first full half floor pan, the cost for the half floor pan was $300 . . . . but the supplier quoted me an additional $680 for trucking, since the pan was so large that it had to go by truck freight. So my total cost per side would have been $1,000 . . . . and that would not have included the new toe boards that I needed.
Trucking costs have gone through the roof in the last couple of years due to the pandemic, truck driver shortages, supply chain issues and diesel fuel costs.

So I ended up ordering new smaller floor panels that could be shipped via. standard UPS and FedEx.

In addition, I was using a friend's garage that had an automotive lift to conduct the floor repairs. He is doing a frame off restoration of a 1973 Corvette which he had to move outside to accommodate me . . . . and I ended up tying up his garage for 2 weeks. I also didn't feel the need to replace the entire floor (because that would have taken up even more time in his garage . . . . . . and I didn't want to overstay my welcome).

I was also concerned about the body twisting if I cut out the entire floor pan and having difficulty getting the new entire floor pan to line up inside the car.

I ended up replacing the floor on one side of the car at a time, with the transmission tunnel and the floor on the other side keeping the body from twisting,

Believe me . . . . I cut out every piece of rotted metal . . . . and every new price of floor was welded to solid metal.
It came out pretty nice . . . . and I will be posting some photos.
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Here are some photos of the new floor panels on the driver's side welded in.

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New inner rocker panels and new floor braces were also welded in.
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thank you for the info enjoying your thread
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After everything was welded in, I used Evercoat # 365 seam sealer on the interior and exterior floor panel seams.
I really liked the Evercoat #365 seam sealer. Good stuff and easy to work with . . . and its thick enough that it doesn't drip when doing the seams under the car.
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I used a disposable 2-inch paint brush (with the bristles cut short) to apply the seam sealer (which has the consistency of peanut butter). Fumes are a little strong . . . .so make sure to use it with adequate ventilation. I kept my garage door open when applying it.

After sealing the inner and outer seams, I painted the inside floor area by brush with some enamel paint and the floor area underneath the car (just to prevent any surface rusting and to neaten things up a little). Here are some photos of the interior floor areas after they were painted.

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Big improvement over what I started with . . . which was a dirty rusty mess.
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thank you for the info enjoying your thread
Thanks for the positive feedback.
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Wish a had an automotive lift . . . but I guess 4 jack stands will have to do.

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I wanted to share a couple of mistakes I made when I was cutting out the floors . . . . and maybe this will save others from doing the same.

Mistake #1
I should have covered the interior of all the glass windows with cardboard, old blankets or thick plastic to prevent damage to them. When I was cutting the floors out with the cut off wheels, glowing hot metal sparks were flying off the cut off wheels and hitting the glass.
When these tiny white hot metal slivers hit the glass, they melted onto the glass. So now the interior of all my glass is covered with hundreds and hundreds of tiny metal slivers melted into them. I can pop the slivers of metal off with a razor blade but it still leaves a hundreds of tiny little melted spots on the glass that you can feel with your hand.

(I bought a new windshield and a back glass and I plan on replacing them soon. I ordered the windshield and back glass panel in separate orders from Auto City Classics. I am pleased with Auto City Classics because the windshield and back glass were packaged very well to prevent damage and their prices were in line with other suppliers. In addition, Auto City Classics did not ship these as truck freight but instead Auto City Classics shipped them as an oversize FedEx package, so the shipping was only $110 per item, compared to most suppliers that ship these as truck freight, which definitely would have cost more).

Mistake #2
I should have worn better eye protection.
I wore safety glasses when I was using the cut off wheels, air chisel or during any grinding . . . . however, the safety glasses had small gaps on the sides that allowed tiny slivers of metal to get into my eyes.

These are the type of safety glasses that I was wearing.

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I few days after cutting out the floors, my eyes swelled up so bad I could barely open them and could hardly see anything.

I ended up having to go to an eye surgeon to have a sliver of metal removed from each of my eyes. Had to wear an eye patch on one of them for 3 days and treatment of antibiotics in both. Took about 18 days for my eyes to fully heal and return back to normal.

I should have been wearing better protective goggles like these . . which have a gasket and fit tight to your face and prevents anything from coming in from the side.

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In addition to the protective goggles, I should also have been wearing a good quality protective face shield such as this.

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I bought these items AFTER my eyes had been injured . . . to make sure this never happens again.
Got them off Amazon and they had good reviews.
I have been using them ever since this happened and will continue to do so in the future.

I got lucky and my eyes recovered . . . . but don't make my mistake . . . it could have been much worse.
Damn. I'm feeling very lucky now. Thanks for sharing. I need to get a shield.
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After driving the car for some time, I determined that the engine's rear main seal was leaking oil.
In addition, I discovered the engine's front crank seal at the harmonic balancer was leaking oil really bad.
I was adding a quart of oil about every 300 miles driven . . . . and I know I wasn't burning the oil because I did not have any blue smoke out the exhaust.

Replacing the two-piece rear main crankshaft seal requires removing the oil pan.
And in order to remove the oil pan, I would need to jack up the engine.
If I have to go about jacking up the engine . . . . I decided that I might as well just remove the engine from the car. That way the engine will be a lot easier to work on . . . since I have a bunch of other stuff I want to do to the engine and the car.

Removed the radiator, radiator support, battery tray, radiator support filler panels, etc.

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Pulled the engine and transmission out as one unit.

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Bought some bolt on engine mount stands from Speedway Motors. These are great for setting the engine down on the ground and keep everything nice and stable.

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An addition benefit of my decision to remove the engine was gaining access to the exterior firewall . . . because I decided to install a Vintage Air kit in the car so that I could have heat, ventilation and air conditioning (HVAC) and removing the engine would give much better access to the firewall area to make installation of the entire HVAC system easier.

Here is a photo of the Vintage Air under-dash HVAC unit to be installed.

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The transmission being pulled off the engine.
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Got the engine up on a stand.
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In preparation for replacing the rear main seal, I took the oil pan off and found that the Chevy small block 350 engine had four bolt mains. I thought that it might, since the engine came out of a 1973 truck.
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Removed the front timing chain cover in preparation for replacing the front crankshaft seal (which leaked pretty bad).
Found out the engine has a double roller timing chain (which was a pleasant surprise).
I also plan on installing a new harmonic balancer.

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New timing chain cover, new front crankshaft seal and new harmonic balancer installed.
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Replaced the rear main seal at the end of the crankshaft.
I bought the standard FelPro rear main seal kit (part # BS40013) and I also bought the FelPro offset double lip rear main seal kit (part # BS11829-1). Ended up using the offset lip rear main seal, which rides on a new section of the crankshaft vs. the section of the crankshaft the old seal rode on.

Also installed a new Melling oil pump drive shaft (part #IS-55E) that has an integrated metal collar, which eliminates the use of the plastic sleeve at the oil pump connection. The old plastic sleeve was so brittle that it shattered into a couple of pieces when I removed the oil pump.

Cleaned up and painted the oil pan. Installed a new one-piece FelPro oil pan gasket (part # 375-OS34510T), which is very thick and comes with new bolts.

Cleaning up the rest of the engine block in preparation for painting it.
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For future reference regarding glass damage.
I suggested this to the boss. He rejected it as being "the trik of the month".
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I ended up cutting and fitting cardboard panels.
Not cheap but it works! I tried it.
Don't feel bad on your glass I pulled the same dumb stunt just not thinking on my 56 windshield cutting the tunnel out & welding in a raised tunnel for a T56 swap while doing all the body repairs. Also accidentally ruined the rear glass when the grinder slipped & the side windows were replaced due to the chrome being pitted more than what I wanted to reuse.I might have reused the side windows had it not been that I was having to replace the front & rear .But the windshield was a surprise when the glass installer took the glass out in the sun while installing the molding & trim before the install. He said I don't think you want me to use this glass. All that ended up adding around $2000 in cost right at the end of the project that I wasn't planning on.Live & learn
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