D44 Drum hitting shoe

I have a d44 that I just rebuilt. Has brand new rock auto cylinders, springs, pads, drums, linkage, cables and so on. The axle is off the vehicle, I have it suspended from my cherry picker. I threw on my wheels and the driver side has some friction to it but the amount is normal, the passenger side locks up. I am thinking the drum is hitting the outside of the shoes. So will I have to get this lip machined down, or am I missing something? Looking for anyone that has experienced this. Thanks!

My backing plates were primed and painted, would this throw the shoes off that much and make them hit the drum?

You got defective or wrong drums.

Bent backing plate, thanks.