My buddie just installed his SLP 777 kit and we rode it on my pond it ran well and they claim 91 octance & 160hp @ 3000ft. My house is at 1947ft and we had no problems on 92. The kit is $2995.
Why does that sound like a lot of money to me for only a 20HP gain over stock? I'm in the same boat though, but I think I'm just going to go with the Carls porting on my sled, and if thats not enough just attach a bottle on it for those special occasions. The Carls 770 kit looks decent, but I havent really heard any info on its performance @3,000ft.