Well except for the head gasket problem, I can't image a much stonger stock set-up than the V6, 3rd gen pick-ups (89-94.5 I think). The newer tacos have the weaker rack and pinion steering and the frame is not fully boxed. The older 4 cyl trucks have a little weaker differental and gears but they did have a solid axle up front for a big plus there.

93 4X4 ext-cab, auto, SR5, 3.4 V6, supercharged, 2.1" pulley, URD fuel mods, Aquamist WI, IPT valve body mod, dual cases, 4" superlift, Alcan springs, 33 BFG MT, ARB locked front & rear, 5.29 US Gears, RB 1" BL, 1.5" BJ spacers, TJM T-17, Warn m8000.