ok this is simple, on your heads,block,&intake is a code that is easy to read heres an example on my heads right above the exuast ports is this code (DOVE C)the first letter is the decade and right next to it is the year itwas made,I'll make easy for you,A=1940,B=1950,C1960,D=1970,and so on.I'm not sure what rest of the copde is but this is a quik way to determine the year of a ford motor