B-Body 8.75 to '65 A

I got a complete 8.75 from a 68 Coronet ( 55" flange to flange ). I know the perches and driveshaft will require work but am wondering how much hassle ( if at all feasible ) it will be to switch from 11" drums and bbp to 10" drums and sbp. Moser can do axles and extra backspacing would provide an excuse to get new rims.

THX, I really did try to search this.