220cc Eliminator Race Aluminum Cylinder HeadsSB-ChevyRace Ready CNC Porting75cc Combustion ChambersStandard Exhaust Port ConfigurationAngle Spark PlugAssembledSold in Pairs, 2/pkg. Small Block Chevy 220cc Eliminator Race Basic Package Components100 CNC Ported Combustion Chambers 100 CNC Ported Exhaust Ports 100 CNC Ported Intake PortsCompetition 5-Angle Valve Job Intake Valve, 2.100'' x 5.006'' o.a.l. Exhaust Valve, 1.600'' x 5.024'' o.a.l. 1.550'' OD Solid Roller Dual Valve Spring, 225 lbs. on seat, .710'' maximum lift, max RPM 7200-740010� Manley 4140 Chrome Moly Retainers 10� Valve Locks 7/16'' Rocker Studs Adjustable 5/16'' Guide Plates Viton Valve Seals Hardened Spring Cups Intake Valve Seats Exhaust Valve Seats Bronze Valve GuidesSmall Block Chevy 220cc Eliminator Race Head SpecificationsHead Torque w/Moly Lube 65-70 Ft. Lbs. Rocker Stud Torque 55 Ft. Lbs. Intake Port Gasket, 1.310'' x 2.180'' w/ 3/8'' radiusFel-Pro 375-1206 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.Exhaust Port Gasket Fel Pro 375-1405 Head Gasket 350ci Fel Pro 375-1003 400ci Fel Pro 375-1014 Head Bolts & Studs Standard ARP Head Bolt Washers Manley StandardStud GirdleStandard Suggested ManifoldAFR p/n 033-4801, AFR p/n 033-4802 or Edelbrock Vic Jr p/n 350-2975 or Super Victor p/n 350-2925 Spark Plug Starting Range Autolite 3910 Combustion Chambers 75cc Intake Port 220cc Exhaust Port 80cc Spring Pocket can be cut to 1.750, no deeper. Valve Spacing Standard GM Rocker Arms Standard Valve Angle 23° Angle Mill.008'' per cc Flat Mill .006'' per ccNOTE:Flat and Angle mills might require a .120'' thick head...
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