Trying to find out some information on this Potter Cam. Pulled out and L28, N42 block/N42 head out of a '75 280z earlier and removed valve cover and saw this. Apparently an "A" regrind. Haven't had any luck researching the numbers that are stamped on it. Only thing I come up with references a #360, and there's not that much about that. Can anyone enlighten me on what these numbers might stand for. Thanks Daniel