10's on $5,000 ?

I also like the short box Dakota plan.

My only concern would be headers.
Are they available cheap?
Are cheap headers close enough to fitting that making them work isn’t a huge hassle?

A “nice” 65-77 B body will be easiest in the long run........ unless you stumble across a 4dr Dart or something.

I’m gonna throw this suggestion out there now.......
Look for a deal on a used tunnel ram.