Pop, Anglia, Model Y and 100E flywheel differences

[Jonny69]

One of you folks will hopefully be able to help. I'm currently running an 1172 103E sidevalve in my Pop. I need to get the flywheel re-faced for the new clutch and so I can keep driving while I get it done I've whipped the one out my spare engine. I could be completely wrong here but I swear it's not the same as the one on the engine in the car. I am sure it was the same as the 100E flywheel, but like I said I could well be wrong. I don't know whether the spare engine is an 1172cc 103E engine or a 900cc Anglia engine, so I guess my question would be is the flywheel the same across the board for upright Anglia and Pop and did it just change for the 100E engine? Would a flywheel off a 900cc fit an 1172cc?

Just for ref here are a few pictures to show the difference.

Out the spare engine, flywheel side. Two small dowels and small diameter bolt pattern for the crank:

http://www.jonny69.co.uk/uploads/pop/2007-12-31_flywheel/IMG_2406.jpg

Out the 100E engine, flywheel side. See how it's only got one dowel and the crank bolt pattern is wider:

http://www.jonny69.co.uk/uploads/pop/2007-12-31_flywheel/IMG_2408.jpg

Spare engine, crank side:

http://www.jonny69.co.uk/uploads/pop/2007-12-31_flywheel/IMG_2407.jpg

100E engine, crank side. See there's like a deep lip round the outside and the ring gear is right at the back:

http://www.jonny69.co.uk/uploads/pop/2007-12-31_flywheel/IMG_2409.jpg

Obviously the 100E flywheel is not interchangeable with either? Did any of the earlier sidevalves have that wider bolt pattern on the crank?