[Super73]

I'm speaking for front springs I tried a set of 6cyl late 80's Cherokee springs. The truck bareley rested on the bumps. Next week I am going to put that spring back in with a 1 inch spacer.I'm guessing it will no longer sit on the bumps and have even more stored energy getting the front in the air fast fr drag racing.

I was on a 4x4 board and was told the V8 Grand Cherokee springs have a little more spring rate in them and would probably take the truck off the bumps with out the spacer.

But from my experience a longer softer spring lifts the front faster. So if the spring is too short, just use a spacer. Just make sure you don't get in to coil bind.