TODAY is a Great Day to visit our Store and order the parts you need for your truck ! ! !
If the 76 runs and you have the time, swap everything over to the 86 body.As for detailing how difficult it is, that is hard to describe in a post, but you basically have to remove everything from one vehicle to another.
If the body on the 76 is that rusted away then surely the frame will be in bad shape too...??