Mike thanks a lot! My cluching and gearing is real close now. Sounds thos pipes would ripp! Just currious anger has those built motors for sale. I no yours ripp and a local friend told me that the 726 top end for the 600 was htg. He said that's wat his team ran years back. Iv seen heard of the motor but realy were that top end come frome? Thanks again!.....hope for snow!