Howdy Back Cobra:
And welcome to The Forum. You didn't say which gasket you wil be using but most likely a FelPro or Victor, in which case a .025" mill cut is needed to compensate for the new gasket. Next, the specs for your new cam will determine a safe range for your CR goal. An elevation of 6,000 ft is going to be begging for as much CR as can be accomodated. I would not hesitate to recommend another .025" for a total cut of .050". That will get you back to an honest 9.2:1 CR and still run regular gas. (What is the octane rating of regular gas in your area?) Depending on the duration of your new cam you may be able to tolerate more.
I'd also recommend that you specify at least a three angle valve job and a back-cut on the intake valves. Inexpensive to do while the head work is being done and worthwhile performance wise. three angle valve cuts are pretty much standard on most valve jobs but the back cut will have to be requested and extra, but not usually very expensive.
If you have future plans to ever go to a bigger one barrel have the carb inlet hole increased to 1.75". It will not effect your stock carb, carb adaptor or linkage, but will have you one step closer if you ever decide to go to a bigger carb. It shouldn't add too much to the cost of the head work.
Other thoughts; What are your plans for your ignition? Whatever you decide plan on more initial advance. Updating to a DuraSpark II system with a recurve of the advance to your specs would be a nice upgrade. And, upgrading your exhaust system with 2" pipes and a turbo type muffler to match is worth considering. It is cost effective when your car need exhaust system work.
Sounds like a great project. Keep us posted on your choices and your progress. And, again, welcome to The Forum.
Adios, David