Kent,
I'm not convinced that you still don't have a problem with the parking brake hardware. You stated previously that the PO had cut the parking brake cables. Go back and remove any parts that connect the brake shoes to the parking brake, the crossbar and the arm that connects to the shoe. This essentially makes the rears like the fronts. See if you can get the drums on, if so it means that whatever was left of the cable is probably stuck and forcing the the parking brake to engage.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine