One of the things I want to experiment with is track bar clearance. Put the adjustable track bar in, and then move the axle forwards and backwards to see how much of a difference it makes for clearance with all the other bits under there. Same in the rear. At an inch and a half of lift, it might make or break a setup.
Easiest way to know for sure is to pull the front springs, set the axle at full bump, then adjust the arms until stuff starts hitting, then back off a tad to maintain clearance. Check to see how close your wheels are centered in the wheel wells.