The '72 C20 I've been using as an IFS donor probably had one of those, it was a big block truck. Unfortunately the rear was gone when I got the truck, and today only the back 2/3rds of the frame remain.

I agree 3.54 would be great gears in a truck with a six as long as you didn't need it to haul a capacity load. I've actaully got 3.42 gears under the 1-ton I'm building but I'm not muzzling the power by staying with an original motor.

1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...