Pontiac 6H heads, 1975 HO,455 CID,2.11/ 1.66 valves (Big Valve) Matched Pair, casting dates are visible in photos ,heads have been cracked/checked and vatted ,Fresh valve job with wide seats for durability, new 7 degree splitlocks, New Steel Valve guides ,full guides not liners.New Valve seals installed. Deck resurfaced with the minimum material removed to get a flat surface.Combustion chambers hand finished . Ready for final cleaning and installation. Please let me know if you need more pictures.