[gmanrides]

Well the 51 Merc block is trash. Cracks everywhere on the underside including pan rail. I did talk to the gentleman at the machine shop who put the 221 together for my buddy and all he did was freshen up the block,honed, bearings, rings, valves etc. on the 221 flatty. The cam is stamped on the face 5-T and 3370. The only reference I could find is it may be a Clay Smith cam. I have two possible intakes for it with one being a 2x2 Weiand that has the heat cross over but no markings or numbers stamped in it. The other is a Navarro 3x2 stamped 2091 no gen mount, no heat cross over with a set of Navarro heads that are marked 8.75. Did not really find out anything on those numbers either.