I have a '92 Toyota pickup that I'd like to lift approx. 4" and I narrowed it down to the Superlift, Trailmaster, and Procomp. The procomp 'kit' is by far cheaper ($386) than the others, but that particular company doesn't exactly have the best reputation. Has anybody ever used Procomp for lifting IFS before or able to give any input? I'm not using their springs, just the brackets for the front dif. Any help would be appreciated. BTW, the procomp lift comes with a lifetime warranty from 4WPW.