1964 Dart Disc Brake Upgrade Questions

Having done two 1973-76 A body disc brake swaps onto 1966 down cars; it's 99% plug 'n' play using the upper control arms/lower ball joints from the donor vehicle along with a matching 5 on 4.5" rear end. The only modifications I had to make were installing different brake tubing nuts to match up to the dual disc brake master cylinder, using the original parking brake cables to the later donor rear end e brake levers and of course having the driveshaft shortened 1.5" due to the longer pinion on the 8 1/4" diff. :)