I got both heads of the 6.2, I had the solicor gaskets,and it was blown in the drivers rear,I still think these are better than the graphite,these will blow in all 4 corners. I am going to experiment with orings and stock thickness victor rienze 4021 ,with flipped fire rings. There is a NADM event on july 17 at Numidia Raceway,and I am thinking of taking the truck there for a dyno run. Also thinking of using head bolts,getting tired of threading the studs in and out,tired of pulling the heads also.