[timgco]

the sc should be good to go for 60K without maint., the transmision is another story with SC'ing a truck along with adding larger tires...esp 38's or 40's.

i don;t think you can put those 8 lug wheels on your 6 lug Z. you can put an adapter/ billet spacer on there, but the hub isn;t going to work. To fit you'll need a 4" lift and 2" body lift to fit well on teh older body style. If you have an 07 or newer the wheelwells are smaller and will require a 6" lift to fit well/ plus you will have to go with Superlift or Rancho to use the stock backspace...but than again the stock back space of the H2 vs either body style Z71, its different.