The Stovebolt Site Forums The Shop Area Engine Shop engine, trans and rearend swap 1950 truck

Running 70-75 does not require a V-8. You need to start with the size tires you want to run, then choose rear gears that will allow you to run that speed at a comfortable engine RPM.

I have the rear from a '73 Chevelle wagon with 3.08 gears under mine. I can easily run 75+ with my six. A V-8 would easily do the same with those gears.