A question of fit.

I'am putting a 360/727 in a 66 Barracuda. Reusing the 6 cyl. k member and Schumacher swap mounts. No power steering or brakes. I have seen a lot of threads about using the iron exhausts form Dakotas and/or Durangos. But they all seem to 67 and newer. Will any of these fit my set up? What if any mods would be needed? Since I became disabled, the budget has gotten VERY tight. No $ for headers.