im building my first hot rod its a 1930 model a coupe on 32 rails ill be running a 401 nailhead. my question is could i use the rear out of the 63 riv parts car i measured it and its about 55in from backing plate to backing plate . its plenty ruged enough and my donor car only has 50k on it . i was going to run a 9in from an early bronco but since i already have the buick rear and its got good finned drums i thought i could save a fair amout by reusing it. thanks.