Edelbrock Single Perf Pontiac 72cc Head Comp

Cylinder Head Specifications:; Combustion chamber volume: 87cc; Intake runner volume: 215cc; Exhaust runner volume: 175cc; Intake valve diameter: 2.11"; Exhaust valve diameter: 1.66"; Valve stem diameter: 11/32"; Valve guides: Manganese bronze; Deck thickness: 5/8"; Valve spring diameter: 1.46"; Valve spring maximum lift: .575"; Rocker stud: 7/16"; Guideplate: Hardended steel; Pushrod diameter: 5/16"; Valve angle: 14°; Exhaust port location: Stock Ram Air IV; Spark plug fitment: 14mm x 3/4 reach, gasket seat. These cylinder heads are designed for outstanding performance gains in 1962-79 389-455 c.i.d. Pontiac engines. They are patterned after the 1969-70 Ram Air IV Pontiac cylinder head. Performer heads #60579/#60575 are 50-state emissions legal for 1965-79 vehicles. They feature 87cc combustion chambers designed to maximize performance while using less expensive, low-octane fuel with a streetable 9.5:1 compression ratio. Our Performer RPM heads with the 72cc combustion chamber are for higher compression engines. Performer RPM #60509 is semi-machined and must be finished by a professional cylinder head porter. They include valve guides and seats installed with no intake pushrod holes. Performer RPM #60587 is not port matched or bowl blended and is NHRA accepted for Stock & Super Stock. INSTALLATION NOTE: These heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit #8549. Deck thickness: 5/8", rocker stud diameter: 7/16", pushrod diameter: 5/16" (width of slot in guide plate). Edelbrock Single Perf. Pontiac 72cc Head Comp. Edelbrock Chrome Steel Fuel Line with Polished Aluminum Filter For Dual Feed Edelbrock Thunder Series AVS Carbs. Pontiac:-:326 (5.3L)/350 (5.7L)/389 (6.4L)/400 (6.6L)/421 (6.9L)/428 (7.0L)/455 (7.4) Fits, Fitments 1965 Pontiac Bonneville Base 1965 Pontiac Bonneville Safari 1965 Pontiac Catalina 2+2 1965 Pontiac Catalina Base 1965 Pontiac Catalina Safari 1965 Pontiac Catalina Ventura 1965 Pontiac Grand Prix Base 1965 Pontiac GTO Base 1965 Pontiac Star Chief Base 1966 Pontiac Bonneville Base 1966 Pontiac Bonneville Safari 1966 Pontiac Catalina 2+2 1966 Pontiac Catalina Base 1966 Pontiac Catalina Safari 1966 Pontiac Catalina Ventura 1966 Pontiac Grand Prix Base 1966 Pontiac GTO Base 1966 Pontiac Star Chief Base 1966 Pontiac Star Chief Executive 1967 Pontiac Bonneville Base 1967 Pontiac Bonneville Safari 1967 Pontiac Catalina 2+2 1967 Pontiac Catalina Base 1967 Pontiac Catalina Safari 1967 Pontiac Catalina Ventura 1967 Pontiac Executive Base 1967 Pontiac Executive Safari 1967 Pontiac Firebird 400 1967 Pontiac Firebird Base 1967 Pontiac Firebird HO 1967 Pontiac Grand Prix Base 1967 Pontiac GTO Base 1968 Pontiac Bonneville Base 1968 Pontiac Bonneville Safari 1968 Pontiac Catalina Base 1968 Pontiac Catalina Safari 1968 Pontiac Catalina Ventura 1968 Pontiac Executive Base 1968 Pontiac Executive Safari 1968 Pontiac Firebird 400 1968 Pontiac Firebird Base 1968 Pontiac Grand Prix Base 1968 Pontiac GTO Base 1968 Pontiac LeMans Base 1968 Pontiac Tempest Base 1968 Pontiac Tempest Custom 1968 Pontiac Tempest Safari 1969 Pontiac Bonneville Base 1969 Pontiac Bonneville Safari 1969 Pontiac Catalina Base 1969 Pontiac Catalina Safari 1969 Pontiac Catalina Ventura 1969 Pontiac Executive Base 1969 Pontiac Executive Safari 1969 Pontiac Firebird 400 1969 Pontiac Firebird Base 1969 Pontiac Firebird Trans Am 1969 Pontiac Grand Prix Base 1969 Pontiac GTO Base 1969 Pontiac LeMans Base 1969 Pontiac LeMans Safari 1969 Pontiac Tempest Base 1969 Pontiac Tempest Custom 1969 Pontiac Tempest Safari 1970 Pontiac Bonneville Base 1970 Pontiac Bonneville Safari 1970 Pontiac Catalina Base 1970 Pontiac Catalina Safari 1970 Pontiac Catalina Ventura 1970 Pontiac Executive Base 1970 Pontiac Executive Safari 1970 Pontiac Firebird Base 1970 Pontiac Firebird Esprit 1970 Pontiac Firebird Formula 1970 Pontiac Firebird Trans Am 1970 Pontiac Grand Prix Base 1970 Pontiac GTO Base 1970 Pontiac GTO The Judge 1970 Pontiac LeMans Base 1970 Pontiac LeMans Safari 1970 Pontiac LeMans Sport 1970 Pontiac Tempest Base 1970 Pontiac Tempest GT 1971 Pontiac Bonneville Base 1971 Pontiac Catalina Base 1971 Pontiac Catalina Brougham 1971 Pontiac Catalina Safari 1971 Pontiac Firebird Base 1971 Pontiac Firebird Esprit 1971 Pontiac Firebird Formula 1971 Pontiac Firebird Trans Am 1971 Pontiac Grand Prix Base 1971 Pontiac Grand Safari Base 1971 Pontiac Grandville Base 1971 Pontiac GTO Base 1971 Pontiac GTO The Judge 1971 Pontiac LeMans Base 1971 Pontiac LeMans Sport 1971 Pontiac LeMans T37 1972 Pontiac Bonneville Base 1972 Pontiac Catalina Base 1972 Pontiac Catalina Brougham 1972 Pontiac Catalina Safari 1972 Pontiac Firebird Base 1972 Pontiac Firebird Esprit 1972 Pontiac Firebird Formula 1972 Pontiac Firebird Trans Am 1972 Pontiac Grand Prix Base 1972 Pontiac Grand Safari Base 1972 Pontiac Grandville Base 1972 Pontiac GTO Base 1972 Pontiac LeMans Base 1972 Pontiac LeMans Luxury 1972 Pontiac LeMans Sport 1973 Pontiac Bonneville Base 1973 Pontiac Catalina Base 1973 Pontiac Catalina Safari 1973 Pontiac Firebird Base 1973 Pontiac Firebird Esprit 1973 Pontiac Firebird Formula 1973 Pontiac Firebird Trans Am 1973 Pontiac Grand Am Base 1973 Pontiac Grand Prix Base 1973 Pontiac Grand Safari Base 1973 Pontiac Grandville Base 1973 Pontiac GTO Base 1973 Pontiac LeMans Base 1973 Pontiac LeMans Luxury 1973 Pontiac LeMans Safari 1973 Pontiac LeMans Sport 1974 Pontiac Bonneville Base 1974 Pontiac Catalina Base 1974 Pontiac Catalina Safari 1974 Pontiac Firebird Base 1974 Pontiac Firebird Esprit 1974 Pontiac Firebird Formula 1974 Pontiac Firebird Trans Am 1974 Pontiac Grand Am Base 1974 Pontiac Grand Prix Base 1974 Pontiac Grand Safari Base 1974 Pontiac Grandville Base 1974 Pontiac LeMans Base 1974 Pontiac LeMans Luxury 1974 Pontiac LeMans Safari 1974 Pontiac LeMans Safari Luxury 1974 Pontiac LeMans Sport 1975 Buick LeSabre Custom 1975 Oldsmobile 98 Luxury 1975 Oldsmobile 98 Regency 1975 Oldsmobile Custom Cruiser Base 1975 Oldsmobile Custom Cruiser Panel 1975 Oldsmobile Delta 88 Base 1975 Oldsmobile Delta 88 Royale 1975 Pontiac Bonneville Base 1975 Pontiac Catalina Base 1975 Pontiac Catalina Safari 1975 Pontiac Firebird Base 1975 Pontiac Firebird Formula 1975 Pontiac Firebird Trans Am 1975 Pontiac Grand Am Base 1975 Pontiac Grand LeMans Base 1975 Pontiac Grand LeMans Safari 1975 Pontiac Grand Prix LJ 1975 Pontiac Grand Prix SJ 1975 Pontiac Grand Safari Base 1975 Pontiac Grandville Brougham 1975 Pontiac LeMans Base 1975 Pontiac LeMans Safari 1975 Pontiac LeMans Sport 1976 Pontiac Bonneville Base 1976 Pontiac Bonneville Brougham 1976 Pontiac Catalina Base 1976 Pontiac Catalina Safari 1976 Pontiac Firebird Base 1976 Pontiac Firebird Esprit 1976 Pontiac Firebird Formula 1976 Pontiac Firebird Trans Am 1976 Pontiac Grand LeMans Base 1976 Pontiac Grand Prix Base 1976 Pontiac Grand Prix SJ 1976 Pontiac Grand Safari Base 1976 Pontiac LeMans Base 1976 Pontiac LeMans Sport 1977 Pontiac Bonneville Base 1977 Pontiac Bonneville Brougham 1977 Pontiac Catalina Base 1977 Pontiac Catalina Safari 1977 Pontiac Firebird Base 1977 Pontiac Firebird Formula 1977 Pontiac Firebird Trans Am 1977 Pontiac Grand LeMans Base 1977 Pontiac Grand LeMans Safari 1977 Pontiac Grand Prix Base 1977 Pontiac Grand Prix LJ 1977 Pontiac Grand Prix SJ 1977 Pontiac Grand Safari Base 1977 Pontiac LeMans Base 1977 Pontiac LeMans Safari 1977 Pontiac LeMans Sport 1978 Pontiac Bonneville Base 1978 Pontiac Bonneville Brougham 1978 Pontiac Bonneville Safari 1978 Pontiac Catalina Base 1978 Pontiac Catalina Safari 1978 Pontiac Firebird Formula 1978 Pontiac Firebird Trans Am 1978 Pontiac Grand Safari Base 1979 Pontiac Firebird Formula 1979 Pontiac Firebird Trans Am