024015 MOTOWN 23° 215/64cc 2.8/1.6 seat bare aluminum heads, 64cc chamber Vortec-style

*THESE HEADS ARE BARE AND DO NOT INCLUDE ANY PARTS IN PICTURE.

TECHNICAL SPECS

Casting ID Number: WOR-077B Material: 355-T6 alloy high density aluminum Valve Seats: Intake (hardened), exhaust (hardened) Valve Guides: Manganese bronze Spring Seats: Machined for 1.560" Valves: Manley stainless steel valves in assemblies Valve Diameter: 2.080" intake, 1.600" exhaust (11/32" stem) Guide Plates: Stock Rocker Arm Studs: Screw-in style Rocker Arms: 1.5 ratio (use of 1.6 ratio may require elongation of push rod holes), Intake Runner: 215cc, standard port location Exhaust Ports: 70cc, standard location Combustion Chamber: 64cc, straight plug orientation Spark Plug: 14mm .750" reach gasket style Valve Job: Multi-angle intake and radiused exhaust Valve Cover Rail: Raised w/ perimeter and center bolt pattern Valve Angle: Stock 23° Accessory Bolt Holes: Stock Spring Specs. Head Flow @ .600 Lift 265 intake, 177 exhaust (Super Flow 1050) 283 intake, 189 exhaust (Super Flow 600) All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water. *Flow numbers are approximate.

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