My friend has this insane idea of making an open air race car (MR). We were discussing on what type of engine to use. I suggested to use the D series cause were looking to get about 120hp but keep it light!(1200-1600lbs) He wants to use some motorcycle engine but im not to sure on that one or like a cheapo geo storm engine. He said with the moto engine you create some sort of gear on the axle and use the entire engine and tranny mounted in the back?!? Ok heres my questions, 1. Would a motorcycle engine work? 2. How much does a D16z6 weigh? 3. Is there any other light engine out there that can produce about 120hp? Thanks for the help and I hope this project sees the daylight!