[Farm Boy]

If you save this manual to your computer the pages will load much faster making it easier to look different hoses up.

After you identify a hose you think might work you can do a part number search on RockAuto.com which will give you several different views from different angles.

 

[Farm Boy]

The 20242 is too short for a V8 with the radiator in the 6 cylinder position.

I would try a Gates 20145 or a 20345. Both of these hoses are 1.75 inches inside diameter on both ends. The 20145 is 16.4 inches long and the 20345 is 18.7 inches long and will probably need to be cut to fit. I can not guarantee these hoses will fit as I haven't tried them myself, but I think one of them might work in your application.

 

[Farm Boy]

Gates 20475 also looks promising for a V8 with the radiator in the 6 cylinder position. It was used in 1965-68 full size Chevrolet cars.

 

[Farm Boy]

Since I expressed some reservation with the Gates 20345 lower hose I installed in a post above I thought I'd take a look at the 20475...since I was going to town and Oreilly's showed one in stock. It looks more or less like most lower hoses I've used over the years. Comparing the two on the bench - the 20475 (on left) looked like it should fit but perhaps wasn't not quite long enough next to the 20345 that I had already shortened and installed:
View attachment 401435

Again - I have a Gen 1 SBC mounted 3/4" forward with a radiator in the 6 cyl position. The 20475 did indeed fit - it was just long enough since the right-angle configuration allowed for enough 'give' to reach both the water pump outlet and the radiator inlet. My concern with the 20345 is that because it lacks that right angle I was used to seeing, the tube heads straight toward the radiator inlet at a downward angle that straightens out just at the inlet. What I hadn't realized until I tried the 20475 is that it has the benefit of extra clearance for the (in my case) fuel pump clearance:
View attachment 401439
Because of that angle and how far it takes the hose toward the right of the pump, which is probably beneficial in some instances (like accessory drives on the RH side of the engine), the back side of the hose gets pretty close to where I have the fuel pump outlet (intentionally configured for the placement of the inlet), and limiting routing choices of the pressure hose to the regulator. So for me, I went back to the 20345 which seems to fit well enough and gives plenty of fuel line access:
View attachment 401441

Another comparison I thought interesting - cost. When I found the 20475 in stock locally I was a little surprised at the price - $36.99! Others in this discussion: 20345 - $21.99, 20145 - $33.99, 20505 - $33.35, 20424 - $33.99. Of course these are local store prices - if you have a part number in hand it's obviously better to shop around. For example a quick check on RockAuto shows prices less than half of the above. I've had the 20345 in my extra parts stash so it was 'free' to me.

Researching radiator hoses was something I really couldn't do until I put the front clip back on the car. I had read several threads looking to find possible part numbers and info, a resource of this forum I greatly appreciate. And as has already been pointed out it's just not as easy as it once was to go the back wall at the local parts store and pick out a half dozen hoses to take home and try out. Hope this info helps someone in this same search down the road.

This is some good information. This narrows down the choices of what lower hoses might work on cars modified from stock.

 

[Farm Boy]

Trying to find an upper radiator hose for my 56. 350 with a stock radiator. No one around here seems to list one?

GATES 20416 This is a cut to fit molded hose.