The valve cover tag does say its a 2BBL 360, built October 23, 1972. The valve cover probably came off of the original engine. The 344 head was used 79 and up, and my bet is that the whole engine matches the heads. Look on the heads in the same area as the casting number but the other end, there MIGHT be a one or 2 digit number cast. That would be the last digit or 2 of the year the head was cast. There also might be the same digit or 2 in the lifter valley. Some engines have them, some don't.

5 = 1972
10 = October
N = 2BBL 360
23 = 23rd day of month

Bob
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