I am considering rebuilding an older chevy truck to tow a fifth wheel trailer (don't own either yet). If anyone knows where I can get the gcvw or the recommended towing capacities for 74-82 3/4 and 1 ton trucks I would appreciate it. Also if anyone has any ideas about the best tranny/ rear end ratios to use it would be great. I am considering a 2wd truck with a 454. Thanks for any help or comments.