mopar65 said big block or small block? here is the kit i used in my 440 RB engine. http://www.hughesengines.com/Index/...el2=U2hhZnQgSG9sZCBEb3duIEtpdA==&partid=22197 pic of the studs. http://www.hughesengines.com/Tools/...HPCDataDir/Images/HUG7442A.jpg&title=HUG 7442 Click to expand...