The Edelbrock 61669 Ford 460 CJ Victor Jr. Series cylinder heads offer high horsepower potential on competition level engines and are compatible with OE valve train and pistons for bolt-on convenience. VICTOR JR. 460 CJ - 310cc FEATURES: Designed for 1968-87 429/460 Fords and the SVO 514 engine Machined profile Cobra Jet-style intake port entries Victor Jr. heads #61669 are complete with titanium retainers and high-quality valve springs suitable for use with solid roller camshafts INSTALLATION NOTE: Match with Edelbrock head gasket sets. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 3/8" (width of slot in guide plate).