BBC grumpy Jenkin heads, oval ports, porting work done, 2.3 intakes, 1.88 exhaust, comes with springs and guide plates no retainers or studs, came off a running jet boat, don't know spring pressures, was running roller cam $ 500, might ship but will be expensive, because they are Iron heads TECHNICAL SPECS Casting ID Number: I-043D Material: High density cast iron Valve Seats: Intake (integral), exhaust (hardened) Valve Guides: Integral cast iron Spring Seats: Machined for 1.560" (can machine to 1.625") Valves: Manley stainless steel valves in assemblies (inconel exhaust valves on marine applications) Valve Diameter: 2.300" intake, 1.880" exhaust (11/32" stem) Guide Plates: Not Included Rocker Arm Studs: Not Included Rocker Arms: Standard Intake Runner: 269cc, standard port location Exhaust Ports: 137cc, Raised .600 Combustion Chamber: 119cc Spark Plug: 14mm 5/8" .460" reach tapered style, Accel 276 or 276S or equivalent Valve Job: Multi-angle intake and radiused exhaust Valve Cover Rail: Raised Valve Angle: Stock 24° Accessory Bolt Holes: Stock Chamber Design: Open
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