Somebody that has access to a Hollander interchange or salvage yard should be able to tell you what fits what. Usually the same year spans. The frame swap itself is pretty straightforward. Easy with a lift and a bunch more work without without one. Get the body off and set the frames side by side and swap as much as you can as unitized assemblies. But, before you get started check the body over carefully for transfer damage. Make sure there are no buckles in the floor or body mounts moved around, door post out of place, buckle in the roof, etc. I've done many frame swaps as a body tech in a Ford dealership and can say 9.5 out of 10 times there is usually other damage and after the frame is under they usually have to go on a frame machine to straighten the body, replace aprons, core supports and the like.
Just make a careful assessment.
Last edited by Hipster_G; 06-11-2018 at 12:02 PM.