80 volare suspension swap into dart?

Sure it will fit. Just sawzall all the decent parts of the earlier car and Jethro up the inferior parts and weld them in. Seriously, why the heck would you want to do this? the F-Bodies were terrible cars!!! The lawsuits and warranty claims that came from that god-awful front suspension were a major factor in the near demise of Chrysler in the late 70's.

If you are looking for an 68-72 slant K-member, and have V8 parts to trade, I doubt there will be any problem. Most people are doing the opposite swap.