I have a set of the 4" rear springs on my 93 pickup.
http://www.summitracing.com/parts/SJA-TR49S/Application/?query=Year%7c1993%7cMake%7cTOYOTA%7cModel%7cPICKUP&prefilter=1 
They work for me seem to give a pretty nice ride on the street with no load. I tow a 6'x10' trailer with around 800lbs on it and seem to hold up very well.
They didn't come with bushings and stock ones didn't fit. Have to get theirs.
This is very true. I bought an energy suspension poly bushing kit. I took the springs and bushings to a friend with a machine shop 5 mins on the lathe and the bushings fit like a glove
just my
