Leaf Spring Bushing Options

I'm replacing the leaf spring bushings on my 74 Dart Sport with polyurethane. It was originally a slant car w/ manual 3 spd., 7 1/4 rear.

The front bushing is 2" diameter. The bolt is 9/16 x 4 1/4. I only see 2" bushings available for 5/8" bolts. The 1 1/2" bushings seem to all have 1/2" holes.

It's going to be mostly strip, so Im also considering aluminum front bushings. I looked at them on Mancini's site and there's no "Add To Cart" button. The 1 1/2 bushings can be added to the cart. ??? Mopar Performance only shows a 1 1/2. Anyone else sell them?

The shackle bushings I have are 7/8".

Is a kit better than buying individual bushings? Who sells what?

It appears I'll have to get the bushings with the 5/8 hole and open up the holes in the mounting bracket.