rear shocks info wanted

I think I would be looking at adding some leafs to your existing spring packs and longer
shocks. Well used C body or truck shocks should have enough extended length to allow the body to rise as needed when hooking up.
It shouldn't be to rough on your tire and wheel budget using worn shocks and used leafs.
I always liked to add a trimmed down main leaf as a second leaf to start.
Cut the front segment of the donor main leaf so that the forward end lands directly
below the front spring eye bolt. This will help with hooking up if the front of axle leaf clamps are reinstalled.
Prevents bending of the original main leaf next to the forward eye.
The rear of the spring is not so important where it is cut and can be just slightly longer
than the existing second leaf.
Depending on how much arch is in the donor leafs is what will determine how much lift
you will gain for tire clearance. Being you are looking to gain a lot look for donors with
more arch than what is on the car now.
It may not hurt to re arch your main leaf but probably not necessary. I know it sounds
kind of sleazy but I have re arched leafs cold in my 20 ton press. Took a while but didn't
cost any coin.
If I had known where I could have taken them to get them done proper with heat I would have gone that route and saved myself a lot of wear on my arm and shoulder.
You will be needing longer u bolts and spring center bolts for the added stack thickness.
I don't know of any pro stock springs being available.
Let us know how you end up getting your car riding where you want it
how ever you get it done.
Great looking car and I like where your going with it. I'll be watching from Indiana.