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| PONTIAC CYLINDER HEAD NUMBERS! |
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| ALL PRE-1968 HEADS HAD CLOSED COMBUSTION CHAMBERS, WITH A 17 DEGREE |
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| VALVE INCLINATION EXCEPT FOR 1967 670/97 HEADS WHICH HAVE A 14 DEGREE |
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| VALVE INCLINATION. ALL HAVE PRESSED-IN STUDS EXCEPT 670/97. |
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| HEAD # CHAMBER VOLUME APPLICATION NOTES |
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| 540306 69 1959-1960 SD 1.92/1.66 VALVES |
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| 544127 67 1961-1962 SD 2.02/1.76 |
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| 9771980 64 1963 421 SD 2.02/1.76 |
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| 9770716 72 1963-1964 421/64GTO 1.92/1.66 |
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| 77 68? 1965 GTO 1.92/1.66 |
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| 092 68? 1966 BIG CAR 1.92/1.66 |
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| 093 68 1966 GTO 1.92/1.66 |
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| 094 62 1966 326 2-BBL 1.92/1.66 |
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| 095 52? 1966 326 HO 1.92/1.66 |
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| 142 62/326,68/400 1967 326/400 1.92/1.66 LOW-PERF |
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| THE FOLLOWING 3 HEADS ALL HAD A 14 DEGREE VALVE INCLINATION |
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| 670 72 1967 GTO 2.11/1.77 CLSD.CHMBR. |
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| 97 72 1967 R.A. 670 W/LONGER SPRINGS |
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| 061 72? 1967 BIG CAR first open cham. head-2.11/1.77, press-in studs |
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| ALL 1968 AND UP HEADS HAD OPEN COMBUSTION CHAMBERS AND 2.11/1.77 |
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| VALVES [UNLESS OTHERWISE SPECIFIED].THESE HEADS ALL HAD A 14 DEGREE |
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| VALVE INCLINATION. ALL HAD SCREW-IN STUDS, UNLESS OTHERWISE STATED. |
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| 16 72 1968 400/428RA,HO BIG CAR/GTO D-PORT/RA |
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| 37 72 1968 R.A.l D-PORT, POLISHED FLAT VALVES |
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| 96 72 1968 R.A.ll ROUND PORT EX., STD. IN. |
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| 62 75 1969 400/428 BIG CAR/GTO W/AUTO D-PORT |
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| 47 75? 69 428,400,350 1.96/1.66, pressed-in studs |
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| 48 72 1969 400/428 D-PORT, M/T, RAllI/HO |
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| 722 71 1969 R.A.IV ROUND PORT EX.,LARGE IN.PORT |
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| 44 67 1969 R.A.V 400 TUNNELPORT INTAKE,RND.EX,2.19/1.73 |
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| 546184 56 1969 R.A.V 303 TUNNELPORT |
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| 11 73/350,90/400 1970 350/400,2-BBL 1.96/1.66,PRESS-STUDS |
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| 16 72? 1970 400 2-BBL PRESS-STUDS, 1.96/1.66 |
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| 12 72 1970 400 R.A.III D-PORT RAIII/HO |
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| 13 75 1970 400 GP/4-BBL D-PORT |
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| 614 71 1970 R.A.IV ROUND PORT EX., LARGE IN. |
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| 64 87 1970 455 HO D-PORT, STD. IN. |
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| 94 80? 1971 350 2-BBL D-PORT,1.96/1.66,PRESS-STUDS |
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| 96 96 1971 GTO/4-BBL D-PORT |
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| 66 114 1971 455/4-BBL D-PORT, PRESS-STUDS |
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| 191 111 1971 455 HO ROUND PORT EX.,LARGE IN. |
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| 7H1 82? 1972 350 ODDBALL W/1.96/1.77 VALVES,PRESS-STUDS |
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| 7K3 96 1972 400 4-BBL D-PORT |
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| 7M5 114 1972 455 4-BBL D-PORT,PRESS-STUDS |
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| 7F6 111 1972 455 HO ROUND PORT EX., LARGE IN. |
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| 46 82? 1973/74 350 4bbl GTO 1.96/1.66,PRESS-STUDS |
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| 16 111 1973/74 455 SD ROUND PORT EX.,X-LARGE IN. |
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| 4X 96/400, 114/455 1973/74 400/455 2.11/1.66,EARLY HAD PRESS-STUDS |
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| 5C 101/400, 114/455 1975 400/455 2.11/1.77 OR 1.66 VALVES |
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| 6X 91/350,96/400,114/455 1976&UP 350/400/455 2.11/1.66 |
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| 6S SAME AS 6X, ONLY WITH AIR PASSAGES IN EX. PORTS |
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| Heads interchange from 59-64, and 65-79. When using 65-71 intake manifolds |
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| on 72 and up heads, Fel-Pro intake manifold gaskets #1233 must be used or |
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| there will be an exhaust leak at the heat crossover passage.Also you cannot |
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| use 72-79 manifolds on 65-71 heads without these gaskets.These gaskets |
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| have three different inserts for the different head/intake combinations. |
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| 59-64 intakes cannot be used on 65-79 heads,nor can 65-79 intakes be used |
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| on 59-64 heads.There are many more head numbers out there,if you know of |
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| any that should be on this list,please send the info to lope421. |
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| THIS INFO GATHERED FROM 'PONTIAC HEAVY-DUTY PARTS AND SPECS'FROM H.O. |
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| RACING SPECIALTIES, INC.,'PONTIAC RACERS & HIGH PERFORMANCE HANDBOOK'by |
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| JOHN ANGELES AND PETE McCARTHY,AND MY OWN EXPERIENCE. |
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