My First Mopar- 1966 Barracuda project

I swapped in disc brakes from a 73 Duster, bolted right in and I can run the 5 on 4 1/2” large bolt pattern (LBP) and there are way more wheel choices available. Stock 8 3/4 rear housing and I have Yukon axles also with the LBP. I think you may need to get a BFH out and make some dents or bend a lip over by the firewall where the bellhousing goes.