64 barracuda rear

Im a cuda man but all ebodys and bbodys till now a buddy asked for help he put a 340 street engine in his 64 barracuda it has a 7 1/4 rear I want to put a 8 3/4 rear in it I know how to build rears etc I can put gears etc in no problem I know I can get any axle length from mosier wondering what rear to look for is there one even close to fitting this car or is it gonna be total cust build for me. my cuda has a 65 bbody housing with springs relocated inward to fit 12 in tire inside wheel well kind of want the same for him maybe a 10 in tire so it will look stock from outside. any suggestions?
Author: mez