New SBC aluminum head casting for engines 1955-2002.Angled spark plug holes. Assembled with high flow valves. Kit with gaskets and head bolts. This kit includes:New pair of F100238 Assembled heads with Angled spark plug holesMahle GS33285 head boltsMahle 1178SCR head gaskets for aluminum headsNOTE:This gasket does not have the proper steam holes for use in 400 applicationC350 engine rebuilder gasket kitHead InfoNew Aluminum SBC head casting for GM V8 engines 1955-2002.Heads are manufactured to accept either Vortec 5.7L (1996-2002) or early style (1955-1996) intakes, along with bolt holes to accommodate for center or outside bolt hole valve covers.Heads Fit many SCB models including 400, 383, 350, 327, 307, and Vortec 5.7L (L30).Heads are machined for 2.02 in intake valves and 1.60 in Exhaust Valves.Rocker post base is designed for a hex screw in type rocker studs.Heads are manufactured with steam holes to also allow for use on 400 style engine.Heads are assembled with undercut valves to allow for more flow.Valves are 0.100 in longer than standard to allow more higher lift than standard camshafts and larger springs required to higher lift. Springs are fitted with a +0.100 in base. Heads take guided 1.6:1 and standard 1.5:1 rockers.
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