Magnum Heads

Hi BJR,
I just bought a pair of Magnum heads for $90. out of a burned up P/U truck. I have no idea what year it was, because it was burned so badly. According to the Mopar Performance Magnum Engine Manuel, these heads should have foundry initials, CF = 360. These initials are not on these heads. A friend of mine says they must be the newer castings. Do you know any #'s that would identify the year? The ports don't look any different than the 318's (NH) that I have seen. And I have been told that the later 360 castings are the same as the 318's.
Are the cracks visual? Do they need to be repaired? I read where the 2.2 L heads had cracks between the valves that never cause any problems. Thanks.

Dave,
Mopar Performance sells porting templates (P/N 4876413) if you should care to try porting your own heads.