I have a 51 half ton pickup. The 216 has been replaced. The motor does not have the center bolts in the valve cover. It has a stamping behind the distributor that is LAQ 4269I9. There is a Captain bar above the starter (I don't know about on e on the other side, I haven't found one. It has a large cast GM in front of and below the fuel pump. Above the GM is a 3. On the center passenger side of the head is a B36 913 and below the 913 is 241 and below the 241 is a 570 all cast numbers. These numbers are hard to make out, I am soaking them with Gunk overnight. I just don't know where else to remove grease. I haven't found a good engine casting number. I think it should be in front and below the distributor somewhere. Is it on the very bottom boss just before the oil pan?
