Checker carries one that is like $10. It is just a lever that bolts to your rocker shaft bolt hole and you use leverage to remove the keepers and retainers. It works pretty good if you can clamp the head down to a bench to keep the valves from moving. I have had no problems with it and it's fast too. I can do one bank in about 10 minutes. http://shop.oreillyauto.com/ProductDetail.aspx?MfrCode=PBI&MfrPartNumber=648546&CategoryCode=3491