For a 1/2-ton the standard answer is the standard cab long box. The extended cab is longer, but still not as long as your 3/4-ton truck's wheel base. You're either shortening the bed or lengthening the frame.


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...