project84 (rahn)
+1y
I don't know about the eskies, but there was someone on here that has a 'zu pup that had Z71's on it and couldn't run caps on them because the dust cap on the front spindle stuck out too far.
It was pretty low though, so maybe if you're only gonna drop it a little bit, you might be able to space them out so you can put the caps on them.
I don't know for a fact, but I'd say just about any GM wheel you'll have to have machined.