72 Duster Resurrection

Sounds like a bad master cyl.

I thought that as well. I am on my third master cylinder. I bought a reman duralast, then a new duralast, and now have a new master from pirate jack: MC5621 - 1960-1974 Mopar A, B, & E Body Master Cylinder (Disc/ Drum)

Same problem on all master cylinders. I bench bleed them and block exit ports while pushing piston in to check for internal leaks also before installing. So Im pretty sure its not my master cyl.

Are rear drum shoes adjusted out with star adjustor wheel so they barely contact the drum.

Yep, adjusted the star wheels so the shoes are just barely scraping the drums but still let them spin.

At this point I would like to have someone knowledgeable take a look and tell me that Im not going crazy here. Anyone live close to Houston and want to earn a beer?