I was looking at some pix of a guy that put the PRG mini lift on his titan. He showed that he had to compress the coil springs on the front to put them back into place. Is this nessicary? I figure if it is for the mini lift, it is also for a leveling kit since they both use the block on top of the strut... maybe you guys know....
Far as I know, no, it's a direct unbolt, rebolt. You have to spin the struts 180° to get them to align with the new holes, but other than that, no spring compression required.
The spring compressor may have been needed if he was changing out the front shocks at the same time as putting the leveling kit on it. Usually that's the only time you'd need spring compressors on the front struts.