SPACER

I have a 94 cherokee with Pro comp LCA made for a 3" lift and stock UCA. I have changed my springs awhile ago to RE 3.5" it sits just under 4" for the lift. I have OME in the rear with a shackle lift but the front is lower then the rear. I was thinking about putting a 1/2 spacer in the front will that cause any problems.

I don't imagine you will have a problem. The only thing is you might need to do is adjust or get a new trac-bar. It's only 1/2" so you probably wont need an alignment and it should not affect your control arms. I just lifted mine and inch more and haven't had any problems