1974 Dodge Dart Magnum Swap

Apparently a couple of years difference makes a big difference, because I used literally everything from my 73 318 on the magnum. (all brackets and bolts) and everything fit like it was made for it.
The harmonic balancer is the only original magnum part on the front of the motor, and I had to egg out one bolt hole a little on it to use the LA lower pulleys.
It must because all of my stuff came off a 82 Mirada. My car was originally a slant 6 car and converting to 5.9 magnum. I pulled everything off the 82 Mirada but a few things are off. The power steering pump bracket has one hole that won't line up and alternator bracket won't work at all.