I run a 350 with a larger comp cam, edelbrock performer intake, edelbrock Q-jet series carb 750cfm, headers to 2.5" duals to 2 chamber flows. I am having a hard time with this altitude and running too rich. I live in Denver at 5200ft and would like anyones help with proper jetting selection. thanks for the help. 1986 K5 All stock except a fully built crate 350 and Ranchos!