what motor was in thw a-body from the factory? a slant 6 or a 318? then what rear end did it have ? im no expet on it but just about all the slant 6 & many of the 318 had te small light duty 7 1/4 rear end & tey all had a small bolt pattern maybe the rear ed builder can re-drill yhe axle end but as far AS I KNOW MOPAR NEVER made a small bolt pattern 8 3/4 axle sorry the other thing u could do is buy different wheels
