This 30 series came off of my yerfdog and worked when I removed it a couple weeks ago. The jackshaft plate mounts under the engine and there are two extra bolt holes for the yerf extended engine plate. It has a 7" driven. There is minor surface rust, and the unit should be cleaned before installation. Included is the belt, driven unit, driver, spacer, brass ring, washers, driver, and assembled jackshaft plate. $65 obo shipped, no dibs, first with payment gets it. Also will be listed locally.