Yeah those were what I was looking at But I need a heavy rate spring because I cant take a chance of my tires hitting my tubs. The 20's are huge in the wheel well.
Bad idea on the spring. If you need to keep the tires off the tubs, make a limiter/bumper like the factory uses.
A stiff spring will only make it ride like a cement truck. Might as well put a solid rod in there.
Pinion centerline on Mopars is offset to the pass side by 1 5/16" IIRC. If you cut the rear and centered the pinion in the housing, you have a some work to do. 8.75 rears are same length axle tubes, pinion offset is taken up by the center section.