Joining to pick your brain

Hey my names Bob
I have my greatgranddads 64/65(depends on if you tag it in Ca or OK). It has had a new frontend rebuild in in 1991 along with original motor and tranny at the same time period. I am now trying to get the interior done and a 4 wheel disc upgrade. I want to put an83/4" in the car but am not having much luck. Want to go to 41/2 wheel pattern as well but don't know where to start. It needs brakes and axel bearings now so I thought about doing it all now instead of rebuilding the 71/4 and drums I have now. Seems like a good time huh? Well hello to all and if you have any advice it's always appreciated thank you. Bob