[Dave at Pelican Parts]

As I said on the Shoptalk BBS, I think the "O" might be a "0" (zero). The location of the number was used on at least some of the VW applications. I'm betting that the engine case is from a VW 411 or 412. Some of them did have the 914 dipstick and oil filler setup.

Since it's an engine that was swapped in, it's really tough to say what crank/rods/pistons/cylinders it has. If it wasn't rebuilt, then it's a stock-displacement 1.7 motor. If it was opened up, then perhaps the 2.0 parts from the motor that used to be in your 2.0 were used.

Are the heads the proper 2.0 914 type? Do the spark plugs exit the engine tin on the top horizontal part, or the side vertical part? 2.0 heads would be a strong hint at 94mm cylinders, though larger could be used. There is some possibility of a stock 1.8 displacement also, but that's not as likely.

The only way to absolutely be certain is to pull the heads and measure the bore and the stroke.

--DD