[GregAgrest]

Got this from a id chart I found on the net.

The first letter is the year range the eng was built A is from 70-79
Second position is the year of that decade 4 is a 1974
The third position indicates the type of vehicle A is a Ford
The forth position indicates the type of part E stands for engine

The rest of the letter and numbers are part number. Sort of confusion to read but they are as important as those first four. Hope this helps.