on my dads '68 k20 he's redoing will it be possible to fit 16x10s with a 33" sts on it? It clears the 17.5" and pizza cutters by a mile. If necessary with a ORD Zero Rate work in the front? if these dont clear wat would need to be done to make it clear? have a spring shop add a leaf to the front? y dont they make a sl lift for a 68?