Multi-angle valve job, new valve seats, oversized stainless steal valves, manganese-bronze valve guides, Teflon seals, Iskenderian high performance springs (will accommodate any high lift cams). All ports cleaned up, less than .010" has been machined off head heigth, never ran. Decided to go with 2000, never got around to assembling the 1750. This head is perfect. $550.00, obo. Call Dale, 303-667-6174.