Is there any way of finding the year of the motor by looking at the #'s under the H22A?? Thanx in advance

 

the year of the head at least is stamped right on the front above where the header goes. there are like 3 or 4 dials...just look for the one that looks like it could be the last two digits of a year. it'll just say 94 if its a 1994 h22a. i think its the second dial from the left.