What are you trying to accomplish hp wise? Speed wise? What kind of fuel are you looking to run and what kind of longevity do you want? If you are looking for something to put around the lake but still have a fair amount of get up and go, I'd try to keep the compression ratio between 9:1 and 10:1. SRP makes some really nice little dome top pistons that will get you right in this range, especially with that large of a combustion chamber. With your C/R in that range, you can run pump gas but still run like you're looking to do. Seems like a pretty moderate cam as well. I'd give it a shot.