Are they not the same as O-300 cylinders? O-200 for that matter? If not, what are the differences?
That's on the old cylinders. Anything made since the 80's should be good.IIRC there was something different about the head/barrel connection?
FWIW: In my experience, the GO-300 reputation was hurt by people not operating them correctly vs a bad engine. However, it did have some quirks but was/is a solid engine if one flew it properly.I believe the GO-300's reputation would be much better today if Continental would have made sure that the O-300 cylinders could NOT bolt on to a GO-300.