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| CYLINDER HEADS - Pro-Port™ Raw & Semi-Finished Heads - Pontiac |
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Pontiac Applications |
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| Performer RPM Semi-Finished: This is a bare version of the 72cc #60589 Pontiac cylinder with unique features designed for professionals modifying the casting for maximum effort performance applications. The casting is semi-finished and features installed valve guides and valve seats that are unfinished. The intake pushrod holes are left undrilled to allow for the preparer to properly place the pushrods to accommodate their port design and ultimate valve positioning. The intake and exhaust runners are left completely Satin (no port profiling or bowl blending). |
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| * Click on part number to see image |
PONTIAC SERIES: PRO-PORT RAW
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| Description |
Chamber
Size (A) |
Part# |
HIP'd |
Angle |
Intake
Port Entry |
Exhaust
Port Exit |
Valve Sizes (B)
Intake | Exhaust |
Valve Pierce Points (X,Y)
Intake | Exhaust |
Valve Spacing |
Valve Seats |
Valve Guides |
| Performer RPM |
72cc |
60509* |
No |
14° |
1.10" x 2.02" |
1.46" x 1.40" |
2.11" / 1.66" |
(0.880", 0.000") (1.150", 0.000") |
2.030" |
Included |
Included |
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| Victor Pro-Port Raw: These new heads are the ultimate choice for extreme Pontiac race applications. They feature raised intake port openings and extended intake flanges for improved flow, while retaining the stock location, making them compatible with Victor series manifolds and Ram Air IV style headers. The intake valves have also been moved away from the cylinder wall allowing for improved burn characteristics when used with larger than stock diameter valves. These heads also features a center water outlet for improved cooling and interlinked rocker stud pad with extra thread engagement for improved valvetrain stability. Finally, they feature raised valve cover rails and spring pads to compliment the improved port design, but still retain the stock bolt pattern. Victor Pro-Port Raw head #77819 features 5/8" raised intake ports and the intake flange has also been extended 5/8", will fit stock manifolds. Victor Pro-Port Raw head #77829 features a 1.25" raised intake ports and flange. |
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| * Click on part number to see image |
PONTIAC SERIES: PRO-PORT RAW
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| Description |
Chamber
Size (A) |
Part# |
HIP'd |
Angle |
Intake
Port Entry |
Exhaust
Port Exit |
Valve Sizes (B)
Intake | Exhaust |
Valve Pierce Points (X,Y)
Intake | Exhaust |
Valve Spacing |
Valve Seats |
Valve Guides |
| Victor |
N/A |
77819* |
No |
12.6° |
0.83" x 1.61" |
1.00" x 1.273" |
2.35" / 1.72" |
(0.810", 0.025") (1.230", 0.250") |
2.040" |
Included |
Included |
| Victor |
N/A |
77839* |
No |
Same as #77819 with push rod holes deleted |
| Victor |
N/A |
77829* |
No |
11° |
0.83" x 1.61" |
1.51" x 1.273" |
2.35" / 1.72" |
(0.810", 0.055") (1.230", 0.055") |
2.040" |
Included |
Included |
| Victor |
N/A |
77849* |
No |
Same as #77829 with push rod holes deleted |
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AMC
NHRA Accepted Heads
Small Block Chevy
