What changed in 73?

Your best bet if you just want the demon look is put a 72 fenders grille and hood . Put the taillights in and bumpers and you'll have a Demon clone. Everything else leave 73 this way when you go to do repairs everything from a 73 will work. Not to mention all the 73 mechanical parts are an update. K member/ spool mounts and suspension are better 73 -76. The only thing would be to add an 8 3/4 rear.

The front spring hangers have a larger diameter hole and are at a different location but are what you will need for a spring upgrade. The factory rear leafs are not that good on a 73 - 76 any model. but the hangers are what you will need for the springs you'll buy. All good springs for an a-body are large dia. spring eyes. You'll want to modify your rear hangers for B/E-body diameter shackles. I have some parts if needed if you get into a bind.