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| Specifications & Features: | |
| Material | A356 Aluminum |
| Intake Port Volume | 185cc |
| Intake seat size | 2.02 |
| Exhaust seat size | 1.60 |
| Intake Port Dimension | 2.045" H x 1.205" W x 3/8 Radius |
| Intake Port Location | Stock |
| Exhaust Port Volume | 70cc |
| Exhaust Port Dimension | 1.355" H x 1.360" W |
| Exhaust Port Location | Stock |
| Combustion Chamber Size | 58cc |
| Valve Cover Bolt Pattern | Perimeter Bolt |
| Valve Angle | 20° |
| Valve Spring Pocket Diameter | 1.460" O.D |
| Max Valve Spring Pocket Machining | 1.625" O.D |
| Deck Thickness | .750" |
| Minimum Bore Diameter | 4.000" |
| Flat Mill | .006" per cc 54cc Max (from 58cc); 68cc Max (from 72cc); |
| Angle Mill | .009" per cc 48cc Max (from 58cc); 62cc Max (from 72cc) |
| Note:Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area | 2.025 sq. in. |
| Spark Plug Dimensions | 14mm x .750" w/Gasket Seat |
| Head Bolt Diameter | 1/2" |
| Stud Mount - Non-Emissions Legal | |
| Combustion Chamber | |
| 8mm Bead Lock Intake Valve 2.020" x 4.900" O.A.L. | 11/32 guide is an option |
| 8mm Bead Lock Exhaust Valve 1.600" x 4.950" O.A.L. | |
| Pedastal 8mm Bead Lock Intake Valve 2.020" x 5.080" O.A.L | |
| Pedastal 8mm Bead Lock Exhaust Valve 1.600" x 5.100" O.A.L | |
| Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available) | |
| 7° Manley Steel Retainers 1.245" O.D x .885" I.D x .655" I.D | |
| 7° Bead Lock Valve Keepers | |
| 3/8" Rocker Studs | |
| 5/16" Guide Plates | |
| Viton Valve Seals .600" O.D x .495" I.D | |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
| Powder Metallurgy Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep | |
| Powder Metallurgy Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep | |
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L | |
| Thermactor Air Injector Reducer Bushing (5/8"-11 x 7/16"-14) | |
| Recommended Components: | |
| Intake Port Gasket, Fel-Pro #1262 | |
| Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads. | |
| Exhaust Port Gasket, Fel-Pro #1415 | |
| Head Gasket, 302/351W, Fel-Pro #1011-1 | |
| SB Ford 1/2" Bolt Head Bolts, ARP #154-3603 | |
| SB Ford 1/2" Bolt Head Studs, ARP #254-4503 | |
| 1/2" Bolt - 7/16" Thread Head Bolts, 289/302W: ARP 254-3708 | |
| Head Bolt Washers, Manley | |
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