You're at 5K ft in altitude now. That works out to DOWNjetting two sizes from sea level.
This guy works wonders with Holleys:
Central Arizona Auto-Techs
578 Miller Valley Road.
Find Filiberto's Mexican Restaurant on Miller Valley. At the north end of their property is an entrance to a long row of auto related shops. C.A. Auto-Techs is almost all the way to the end.
As I said, this guy is good with Holleys, but that's what I've got and never taken anything else to him.
Dave's Auto Repair
917 Hinman St (Off of Iron Springs)
I've never used him but he ALWAYS seem to have Jeeps (YJs mostly) waiting to be worked on
Paved roads are just for getting you to the starting point!