My rear drums are locking up when they are mounted with lug nuts. I pulled the brake shoes so they don't rub the drum at all, but when I tighten the drum, I can't physically turn the drums. I drove it like this to see if anything is scraping or rubbing but no sign of any interference on the drums nor any components. I installed 4 new rear wheel cylinders, new metal brake lines, new hoses and new pads all around. I have a 72 fj40 with a Chevy 350. What gives? I'm loosing my mind...