Cam wiped out, what the hell did I do wrong?!?!?

moper said
64, what year is the block?

Think it was a '78. I'd have to double check to be sure. I bought 2 at the same time, and one was a '78, I forget the other, but seems like it was late '70's also. One was out of a tow truck, and the other out of a truck or van also.