[Dave at Pelican Parts]

Things to check to see if it's a 2.0 914 motor or not:
1) Spark plugs. In the one pic of the engine bay, it sort of looks like the spark plug lead is coming through the engine tin on a vertical piece, not straight up on top of the engine tin. If so, then this is most likely a 2.0 motor.
2) Head studs. 2.0s have three studs holding the intake runner pipes onto the heads. One on each side, and one down in between the pipes. The 1.7s, 1.8s, and the VW Bus 2.0s have four studs--two down in the middle.
3) Heat exchangers. Less of a positive indication, but still a good sign: 1.7/1.8 heat exchangers bend upward a few inches from the muffler flange. The 2.0 ones are flat all the way back. But, the 75-76 exchangers (1.8 and 2.0 both are the same in those years) are also flat. They have a single tube inside of them with a triangular muffler flange, while all of the earlier exchangers have two pipes in each and a trapezoidal muffler flange.
4) Serial number. Look in between the oil filler and the fan shroud--clean the area and get all the hoses and such out of the way. If you find a serial number there, and it starts with "GA", "GB", or "GC", it's a 2.0 914 engine. If it starts with anything else, it's not. Also look on a boss (raised flat area) on the right-rear area of the top of the engine case. 914 engines would start with "W", "EA", "EB", "EC", or "AN". Other VW-badged Type IV motors can start with those, though.

None of these are absolute indicators; I know people who have used 2.0 exchangers on 1.7 motors and vice-vera, and 2.0s with 1.8 heads and even one or two 1.7s with 2.0 heads. And you can build any displacement Type IV motor on any Type IV case. But they are pretty good indicators. The cylinder heads are one of the more expensive 2.0-specific parts, so it is pretty rare that someone puts them on a smaller motor.

--DD