Hey, I see you are looking for a good engine. I am changing brands due to sponsorship, and will make you a smokin deal on my modded Argus A52. It has less than 1 gallon thru it, and would make a great engine for your club racing. I'll let you have it for a flat $100 shipped, which is insanely below its worth. Let me know if you are interested, and you can check be out on the Argus or Alpha threads here on RcTech.
Kris