If I swap a 4.10 pumpkin out of a 66-73 chevy 3/4 ton to my 49 chevy 3/4 ton what would be my top highway speed with the original 216, 3 on the tree ??
Depends on a couple things, your tire height and what you consider a comfortable cruising rpm. Google "rpm calculator" and find one you like then plug your numbers into it. 55 to 60 mph should come easily with the 4.10's. You should be able to do 55 now if you're running 17" tires.
