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these are the 58cc combustion chamber heads they have been unshouted on the intake side and 1.94 stainless valves installed. they have a 3 angle valve job and bowl hogged .600 down into int and exhaust pockets. they have been cut for screw in studs and guide plates.they also have been machined for pushrod clearance. bronze liners installed. the oil seal to retainer clearance is .630 on exh and .600 on intake they have been assembled with .570 lift springs and installed ht is 1.750. these heads are really nice and bolt on ready they also have been decked .013 both on a winnona broach surfacer and all seats were done on serti valve cutting machine with carbide cutters so accuracy is all the same on all aspects of machining. I will take $450 complet ready to bolt on minus rockers. will add gm roller rockers and polylocks for $125. Many lengths of pushrods available and in stock call for your lenth all sets start at $65. chris 386-837-8046 oops almost for got have umbrella seals and 1.5 stainless exhaust valves and valves also have been backcut for more velosity. Can't buy these valves out of a box just another trick for flow characteristics.H.P. made simple.