3/4 ton to 1/2 ton

[JohnnyG.]

well, this is my first post on here. ive got a 64 chevy 3/4 ton. i work at a kustom shop in morro bay Ca. my truck is getting dropped(no bags) chopped 5", bed is getting shortened but not all the way to a shortbed. im making mine dead inbetween. well here is my question:

what all do i have to change in order to get it to be 1/2 ton? i swapped springs all the way around and shocks. changing out the rear end is coming ( not sure what im going to go with, but something with better gas mileage) and then swap the front brakes to 5 or 6 lug. any suggestions? heard that G-body cars ( mid-late 70's Gm cars) and early 70's pick up but whats the best? i have a 305 w/ a powerglide now. any help would be appreciated. thanks.

johnny