For all u rotary heads, a friend has given me a 13b with a racing beat intake and header with a 650 holley carb and im trying to make a jet boat with it. I have also recently purchased a berkeley jet boat pump and all the jet boat guys say i will have to put some sort of a gear box on it to slow the rpms down but im wondering if it would make enough power ,, say 300 hp at 5000rpm with a turbo on pump gas , is it possible.