I know there is a way to id the two so you know what you are looking at -- but what is it?

I believe the answer is 2.0 heads have three bolts on the intake as opposed to four bolts on the bus heads, for starters.


John

More info here.

also the angle of the spark plugs

valve size
check out tuna can
http://www.tunacan.net/t4/reference/cylhead.htm