If you are doing major power ad-ons soon, DONT get C&L. Get a ProM 77 (or 80 to save some $$).
This way, you get it ONCE with the right calibration. My friend did his 95 years ago with MAF, TB, and U/L intake all at once, and he said it felt like a new car.
I agree with JR that unless it's bad, changing out only the MAF is probably not worth the $$, since it could be better used.
RC