Honestly then the out of box stock jetting should be very close to spot on. Holley calibrates at sea level 70 deg ambient temp. Since things like Barometric pressure, air temp, and altitude have an effect along with compression ratio/cam timing, ignition timing curve the only way to really fine tune it properly is by using a wideband 02. Most of the Holley's I have tuned here in Austin using my LM-2 Dual Channel WB Data logger are fairly close if not a tad on the rich side. As you go up say 1k feet in altitude you will typically drop 1 jet size per 1k feet. So if stock was a 66 you may use a 65 at 1k feet. But again that is once you have established what the baseline AFR is.
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06-Corvette z51-6spd,b&b,K&N low miles.
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