1976 Spectra Daycruiser running a ZZ502 Chevy crate motor with a tunnel ram and 660 center squirter Holleys. Have the carbs jetted with 72s which was ideal at sea level in Virginia. I'm living in Colorado now and thinking about bringing the boat out here. Will I need to change jets in the carbs ? Will the altitude at 8000' change the lean/rich mix ? Running 100LL because of the glass tanks.