Disk Caliper wont go back on

72 Duster with front discs:

Pulled the car into my garage to do the wheel bearings today. First side was a pain in the ***, broke the transfer tube somehow and had to fab one up, the wheel on that side seems to be dragging the brakes. Barely turns, finger tight on the retainer nut and cotter pin in. Spins fine without the caliper. I did not disconnect the flexible hose. (Should I have?)

The the next one went pretty smooth until i had a problem with the cotter pin and lock nut. It seems like the cotter pin had to go in at an angle like the nut wasnt going far enough. Checked the races of the bearings but they seem in there.

MY MAIN ISSUE: The caliper wont line up with the mounting points on the back. I tried compressing the pads. but it just seems off, like its not even very close. Messed with it for about an hour and now my back is killing me. Please help me. Im new to Mopar and haven't worked on old cars in many years.