I am moving ahead with my project. In the process of stealing tin and intake from and old SP engine, it occurred to me that I may need the SP rocker assembly. Does anyone know if they are different? Also, I purchased a new stock exhaust for the engine. Can I still use it with the SP heads? Thanks guys. Ric Jablonski Roan Mountain, TN http://pages.preferred.com/~docric/oktoberbus001.htm