Advice on Edelbrock 1404 CARB @ 6700 FT Altitude

You want to be 2% leaner for every 1500 feet of elevation.
Number 24 on page 18 of the edelbrock tuning guide is good starting point for you. Requires just a rod change. If you do not have access to a guide replace stock rods with #1440 in your kit(060 x 057).
Will be 8% lean after this.