Switching from 8-1/4" to 8-3/4" rear ?

RPMagoo said
If I switch from current 8-1/4" rear, to a 8-3/4", in My 65 Valiant, what do I need to change ? Assume that the 8-3/4" is complete drum to drum, including brakes. -- Thanks

Where are u located? I'd be interested in the 8.25 when you switch out. I'm in Atlanta.