The rockers for the Big Block chevys can be used and sometimes can be found cheaper off Ebay. They come in 1.7 1.73 1.75 1.8 1.85s The 1.7 - 1.75 will do the trick.Our L6s are 1.75 for a little more kick. Go with a RV style/Type cam You can run stock springs with That type cam JUST MAKE SURE They are NEW!!