disc brake swap turn full resto

This year its paint, body, and brakes (maybe the head light mod). Next year I'd like to get going on the 360/727 and the 69 b body 8.75 with limited slip ($100 junk yard rear end). I need to buy gears thinking 3.55 or 3.73. The rear is all torn down with the perches moved cleaned and painted with the 11" drums all rebuilt.