what he saidTwin-10s said:if its a zq8 it is allready dropped 1.5" front and back with springs.
for a 2/3 drop u need 2" spindles and 3" blocks
spindles p/n bel-2100
blcoks p/n bel-6202
u will need to remove the rear bumpstop brackets.
your stock shocks will work fine with this drop.