who makes a kit to level the front of my 00 Z71??

 

http://www.cepek.com/

That should help you.

 

How big of a tire can I fit if I raise the front??

 

ford torsion bar keys also work
i remember a couple threads a while back about the keys from a leveling kit being the same as the ford keys. and the ford keys are cheaper....
just the company over priced them....

 

well where i come from, your ride (esp. a Z71)looks real clean if its bull-dogged.(lower in back higher in front)I raised my front by turning the torsion bars up it only raised it about 2 inches but i can tell its raised,with the back bein lowerd,if yu do this make shure you git it re-aligned after about a week or so <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />