360 cam identification

Hello folks,
I'm curious to see if you guys can tell me what cam I have by the part number stamped on the end of the cam. It reads 645, then there's what looks like a M or Z that's circled, then A2. (645 M A2) with a dab of yellow paint. By the distributer gear there's 1108 casted on it. I thought maybe an old melling or something but google has turned up nothing. I figured you guys might have seen something like this. My plan is to replace it with a XE256H for the 360/727 in a 67 barracuda. Also LD4B, 340 exhaust manifolds, and 7.25 rear with 2.76 gears. I wanted to put on a four barrel but the 360 has '973' 318 heads and with what I thought a 2 barrel .410/.412 cam but I am not sure I guess i need to buy a caliper and measure the lubes. Thanks in advance guys.