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1970-1992 GMC Jimmy
570" ID that works well with our 938 and 927 dual valve springs
All feature anodized aluminum fittings
Compatible with all COMP tools that require a dial indicator
RPM Air-Gap 340 / 360
Edelbrock Performer RPM 348/409 Chevy Cylinder Head - Complete R01P003L 1970-1992 GMC JimmyCylinder Head Specifications; Combustion chamber volume: 16cc; Intake runner volume: 215cc; Exhaust runner volume: 115cc; Intake valve diameter: 2. 19; Exhaust valve diameter: 1. 72; Valve stem diameter: 11 32; Valve guides: Manganese bronze; Deck thickness: 9 16; Valve spring diameter: 1. 55; Valve spring maximum lift: . 600; Rocker stud: 7 16; Guideplate: Hardened steel; Pushrod diameter: 3 8; Valve angle: 0 ; Exhaust port location: Stock; Spark
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