the compression has probably not increased that much i tried to keep it low in hopes of running either a turbo or nitrous. i am really intertested in the turbo but since i am only running cast pistons i am kind of worried. i would keep the boost low but i do not know if that alone will be enough. i have even thought about water injection to help control things better but i have never done anything like this. the people at holley said that a 75hp shot of nitrous is all it would take. that would get me right up close to the 300 mark. i was guessing about 220hp so i was in the right ballpark. if i could find a diagram on how to route the turbo plumbing i would like to go that way if you thiunk the engine can take it.