Engine / transmission swap? Parts truck.

[Birminghamk5]

I am looking at buying a 1972 2wd C10 longbed with a 350 4 bolt main / 350 turbo transmission as a possible parts truck for my 71 k5. The owner bought it and started to rebuild as a project with motor and trans first. The motor and trans have both been rebuilt in the last year and a half. What if any modifications / parts might i need or can I swap them straight in to my K5?

Also, had anybody ever taken the bed out of a long bed and used it in k5? If I am going to buy this c10 I would like to get as man parts off of it as possible for the k5.

Basically, how much of the C10 can I use on the K5? I need the floor boards, bed area, the engine and transmission because mine are dumping fluids out everywhere. Thanks