This is a set of Dart Pro1 aluminum V8 cylinder heads that came in for a valve job and surface to be freshened up. These cylinder heads are off of a 434 cubic inch small block Chevy V8 engine in a sandrail dune buggy that runs on alcohol. We disassembled the heads to do a light cleaning to them. We then lapped in the valves to make sure they made good contact to their respective valve seats for a 100% seal. We then reassembled the heads and vacuum tested each individual intake and exhaust port to ensure there were no leaks. We also lightly surfaced the decks of both cylinder heads to make sure they were smooth and flat for a good seal with the new head gaskets once they are torqued back on the engine. Complete machine shop and cylinder head service is our specialty here at our fully equipped machine shop here in Las Vegas, Nv. Motor Mission Machine & Radiator 5435 Desert Point Dr. Las Vegas, Nv. 89118 Phone: (702) 649-2366 or (702) 649-0648 Fax: (702) 649-4133 www.MotorMission.com Facebook.com/MotorMission