OK, ok, ok.... Lets solve this once and for all... Go with a Leaf sprung vehicle. Kits are generally cheaper; why you may ask? Leaf Spring suspensions have MANY less moving parts. I just got done putting a skyjacker 8inch on my friends commanche. the back was not prob, slap the leafs under it, and it was ready to go.....but the front was a different story. He had to order custom control arms(thats 4 moving parts) a new trac bar(Which MUST be connected on coil spring suspensions to align axle, and also limits travel; 1 more moving part). A leaf suspension is simple, its a connected leaf, and a shackle. 2 parts, a leaf is suspension AND alignment, a coil is just a dampener. If you have leafs set up right, they can flex better then a coil. Coil tend to bottom out unless you have a "Super-expensive thru the hood setup"(much like a prerunner) If you take a slinky and place it on the ground, then pick up the top half, It will felx good upwards, but once you start to press the slinky towards the ground, you will notice I DOESNT COMPRESS any farther. It is fully bottomed out. Another think I dont like about coil springs is the control arms. Control arms majorly push or pull your axle farther in during compression. Leafs do this too, but you dont have to adjust lift kits for it other then an axle length.
A 4 inch lift kit for my wrangler comes with one key element, Lifted springs. A lift for a coil comes with new control arms and coils. These setups can be VERY noisy if not set up right.... anyway, enough rambling... Im a leaf guy, ever since I road in a lifted Grand Cherokee with 4 inches of lift, I have HATED coil lifts, it was loud and rough, and too many moving parts. I like my 87 wrangler whether it gets 10 miles per gallon or 10 gallons per mile!
Enjoy you choice.... but along with every other person here, I say, go with the 4.0 EFI, the 4.2 is a powerful engine, but you must have a lot of patience to appreciate it!
94 ZJ - Grocery Getter, Work Commuter.
89 FSJ - Work in progress.
87 YJ - 5' of lift, Xterrains 33's. ARB Snorkel.
48 CJ2A - Lawn Sculpture.