I never thought that the auto would be the same but I guess it would if the final gear is 1:1. I'll have to start looking for something else.
The rearend that is under the truck now is out of a '58 1/2 ton truck that I installed. With the original rearend which had 4.56 gears, I was only able to go around 45-50 mph. With the newer rearend I can now go 55-60 but the engine is running right at 3000 rpm. I don't want to go much faster, just get the engine at a comfy cruising rpm.
I also want to swap the original trans because I cant ever seem to keep the clutch adjusted. I'll adjust it and it'll be good for a little while but then won't want to fully release.
