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Headers and Exhaust System Discussion related to Exhaust systems and headers.
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Old 02-21-2020, 12:32 AM   #31
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Sounds like you are on your road to recovery
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Old 02-21-2020, 12:35 AM   #32
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Sounds like you are on your road to recovery
I appreciate you're optimism. I'm still not all the way there yet.
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Old 02-21-2020, 02:56 AM   #33
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56er...I had the Dougs D353's on my '56 with 3/4" forward mounts and that same header tube was very close to my firewall. I think if you adjust your driveline angle and dimple the firewall you'll be good. Or you could move the motor forward a bit too, but that may introduce drag link to oil pan clearance issues.

When I switched over to a C4 front end, I had to go to a set of Williams headers...his have a slightly different design on that tube that allowed me to clear my firewall with my C4 front clip.

Good times
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Old 02-21-2020, 08:57 AM   #34
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Those are at risk of hitting the pavement on a stock height car. Lowered just means they certainly will.
I have them on 2 of my own vehicles and have installed them on 4-5 customers vehicles, All are stock height. I have had zero road contact in over 65,000 miles with mine and 2 of the others (people I travel with) I installed have had no road contact either, I can't say on the others since the cars were sold out of the area so I don't see them.
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Old 02-22-2020, 01:25 AM   #35
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56er...I had the Dougs D353's on my '56 with 3/4" forward mounts and that same header tube was very close to my firewall. I think if you adjust your driveline angle and dimple the firewall you'll be good. Or you could move the motor forward a bit too, but that may introduce drag link to oil pan clearance issues.

When I switched over to a C4 front end, I had to go to a set of Williams headers...his have a slightly different design on that tube that allowed me to clear my firewall with my C4 front clip.

Good times
Hitchens, Just out of curiosity, what heads did you run when you had the Dougw? I've heard heard there are different exhaust port angles on aftermarket heads and I'm look at a pair of Brodix IK 200's. I'm fitting now with empty stock heads. I'd like my new ones to have some angle to bring the pipes in a little closer to the block. Any recommendations?
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Old 02-22-2020, 03:45 AM   #36
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Hitchens, Just out of curiosity, what heads did you run when you had the Dougw? I've heard heard there are different exhaust port angles on aftermarket heads and I'm look at a pair of Brodix IK 200's. I'm fitting now with empty stock heads. I'd like my new ones to have some angle to bring the pipes in a little closer to the block. Any recommendations?
Hey buddy!

I had the D353's on 3 different sets of heads and 2 different motors.

First two sets of heads with the D353's were on a stock GM block (a 383 SBC). The picture I sent you was with that block and a set of World S/R Torquer heads (which I think were/are 462 copies). I then swapped those for a set of Profiler 195's which really woke up that motor! No problem in either case.

I got the HP bug because that 383 just wasn't cutting it, so I installed a Dart SHP 421 SBC with AFR 220 heads. They were a tad closer to the box because that block and those heads were just bigger than a standard SBC and heads, but I didn't have to change anything with regard to the 500 box. I don't think I have any pictures of that, but I will look and if I find some I'll post them!

I really don't think you'll have any issues if you clearance the box. Just be careful not to take too much out of it. Honestly, I took a fair amount off my box, but I never had a leak. It was all at that same corner. I just hit it with a grinding wheel, smoothed it a bit, and then repainted it. If I hadn't told anyone I did it they would have never known. I later sold that box and told the fellow I sold it to that I had done so and he said he really didn't care as long as it didn't leak.
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