Up for sale is ZO6 cylinder head,was done by a shop in CA. 1500 miles ago. Had 3 angle valve job,dual coil Manley Springs ( capable of .0650 lift),titanium retainers. There is a small dent on one cylinder head at bottom deck sidewall causing a high spot. Just needs to be sand down, least 6 - 8 titanium retainers are nicked up from transportation damage because the shipper didn't put a divider that is the full height of the heads between the two heads so the retainers hit each other from handling & transportation. The retainers are fine to use as its only a cosmetic nicks. I purchased the heads for $800 I am asking $700 or best offer plus shipping,handling, & insurance charge.I was going to put this on my 04 GTO LS1 engine but now I am going different route. If want a name of the shop who did the heads i can provide upon request & i can also e mail photos of the cylinder head just e mail me ur e mail address to joc1367@sbcglobal.net