Camshaft; I'll second what roger23 said about Mark. There are a few good reputable guys out doing it the way our grandfathers taught us. Mark's B&T and Magadore B&T and Fin&Fur can all be trusted for honest dealings. I havent heard any thing bad about these guys and there are others I havent listed but these are a real good start. You hit the nail on the head asking here first for those reputable dealers cause the bad guys are out there under the rocks someplace waiting.