There’s a guy on youtube that did at least one in a B or C series truck. His has the fugly dak dash somewhat tastefully integrated but I like old stuff better too unless it’s a full clean slate interior. I’m doing a dak swap now too but just the chassis. The 318 would be so nice with stock efi but I had a 3.9 yuck. I would test it as you disassemble- see what you can get away with unplugging to avoid hiding a bunch of dumb stuff somewhere just so it’ll run.

Maybe somebody around here knows from experience so you could avoid spending an hour unplugging stuff on a running donor? Good luck with it!