[JP Noonan]

I don't know if I'd fire him, maybe a slight repremand in the file though.

If the spark plugs are an equal distance from the tin ware it is the 2.0L heads which have a shallower angle to the head ("shallower" I guess depending on how you look at it). If the two front plugs seem deeper in then the two rear it is a 1.7/1.8/or 2.0L bus head. The three stud/four stud is an easier way.

Just to add: anything starting with a "W" or "E" is a 1.7L or 1.8L. The 1.7L were the same preety much across the board. The 1.8L 914 motor had larger valves then all but the Eruopean carbed 411 and bus motors, only real way to tell if it is a bus engine or 914 is to look at the casting number next time you adjust the valves.

Anything starting with a "G" is a 2.0L but only the
"GA" (USA 73-74 95hp)
"GB" (Euro 100hp)
"GC" (USA 75-76 914 and 912E 88hp due to all the emissions equiptment, the heads have four small tubes for the air injection on either side of the intake ports).
Are 914 motors.

Any other "G" block is from a bus.