Lift question
 

Just put on 4.5 rubicon express lift with full rear leaf, the kit came with 1in transfer case drop, but also the guy from 4wd said i should probably do a slip yoke to fix the angle, I was wondering if its Fine to drive for a while with out the yoke, or if u really even need it, anyone have any thoughts

A t-case drop is only a band-aid. It masks the problem. You will eventually need a sye unless you like replacing u-joints every few months. With that being said you should be fine to run it with a t-case drop until you have time to install a sye.