[Karl Bebout]

Gary, leave well enough alone. Your car runs and sounds great so why mess with it? How does it do going up to Springerville? You won't be getting into much more elevation in the East and even then, you probably won't be staying at it very long. I can tell and smell the difference when I take my car to Springerville but there again, it's just for a short time and I put up with it.
If worse came to worse, you could easily change out your jetting and idle mixture to lean things out if you were going to be at high elevation for any length of time. Just remember to put it back where it all was.

You'll surely find something else to spend your money on...