Help with an 8 3/4 swap

You have to have the car sitting "normal" with weight on the wheels. I don't know how else you would do it except "bolt it in" But before you do something that expensive, I'd make sure your rear springs are "what you want." I did a real low budget backyard deal with mine---I junked out (actually a couple) of Duster/ Demon cars, and tore apart one set of springs off one car. Took those leafs and my originals, and "double stacked" all the longest leafs from both sets. I believe I have one more leaf than stock, but the bottom leaf is longer than original. It raised the car a little but really stiffened it up nice.

I don't know how big your area is, but even here you can buy center bolts and spring clips.