Two piece rotor and hub - why not explained in service manual?

rms492 said

What are my options to change to '73-up LBP?

How do I change the rear axle one?

I'm still learning how to restore Mopars.

Oh I think I found something: http://www.moparmusclemagazine.com/...ow_to_install_a_big_bolt_pattern/viewall.html

Click to expand...

You'll need the 73+ upper A arms and spindle, the caliper brackets (stock is 10.87 rotor or you can find a set for the 11.75 rotors) and the calipers that work with the caliper brackets either pin (rare) or sliding (more common) and of course wheels with the 5x4.5 (5x114.3) bolt pattern and WAY more wheel options!

The rear you can get your hands on a 8.25 rear with the 4.5 bolt pattern for next to dirt and will hold up quite well a mildly built V8 (you can also use the 7.25, 4.5 bolt pattern axle but I wouldn't because all 7.25s are junk as a stock slant 6 can destroy them).

If you choose to go this route, you can sell your 5x4 bolt pattern Disc brake setup for a good chunk of change which will cover most if not all the cost to convert the front end. The reason for converting, other then going from drums to disk and for better wheel options, are WAY cheaper parts and a hell of a lot easier to find parts for!