Over a few days I watched and learned as Dmitri put together a 6.6L Duramax that was going into Paul and Drew's Silverado. The original engine blew a headgasket which welded the bolts, heads and block temporarily together. The build went smooth except for when I nearly blew a gasket torquing the head bolts to 125 lb-ft with a short torque wrench. I'm still feeling that one.