Rear end for 65 barracuda with 5x4.5 bolt pattern

Looks great! Am I correct in that the 8 1/4" fit into the '65 without narrowing? What about spring pads and shock mounts?.. For the disc brake upgrade, what did you need from the donor car vs buying new? Thanks in advance as this is exactly what I want to do in my '64.
Simple bolt in for 64, the only thing you have to do is shorten the driveshaft. Or any A Body for that matter. Not sure on disc brakes, I never bothered.