Axle and brake help

[Kalums]

Ok here is a head scratcher for me and I'd appreciate any help given, so I've got a 71 GMC K2500 that somewhere along the line a previous owner put a Dana 70 DRW axle under... I've identified it a a Dana 70 from the bottom passenger side gusset on the differential housing. The serial number stamped into the passenger side axle tube (if I remember correctly, I will re-look/ take pictures in the morning) identifies it as an mid 80s (84 I believe) Dodge W350 axle. With all that info I am having a hellacious time finding the rear shoes... They measure out to be 13x2.5, but NONE of the shoes I can find have the correct/ same holes for springs and hardware. I've included (horrible) pictures if they help. The pictures are of the passenger side and the rear shoe seems to have been manually drilled to accommodate the paking/e-brake "pivot arm". I can readjust or redrill new shoes to match if need be but the closest myself and ANY parts store or brake specialist near me has come up with is the Wagner Z320R shoes but the top spring "hole" is in the wrong place. Again any help would be greatly appreciated.
PS the drums only say "BUDD 96125" on them.
I would also like to point out that a few parts seem misplaced in the pictures to me... These are before I took anything apart... AND no the rears have never functioned since I've had the truck. ( I think there is air in the line and the wheel cylinders leak)