Had an interesting find this weekend while I was doing some detailing. I was doing some research on block castings, engine codes, and partial VINs. According to the drivetrain info, the only block castings for the 67 L6 engines were 3877178. Started getting really confused when I found my block to be what is suppose to be a 68 block (3921968). The engine code matches my POP (F0626FM). Some may say that the engine has been replaced and the engine code restamped. I know for a fact that this isn't the case. This is the same engine that came installed in the car in 67. The only other numbers that are visible on the block are above the starter and adjacent to the transmission filler tube. There are 2 plates: 1) CON2 2) 247. I have no idea what those numbers could possibly be. All of my documentation is original and I haven't bought a bogus POP. Just curious if this could be a conflict with the drivetrain info.