I don't know...... I'm thinking.
I agree with George, on how to look the simple way to see if the cam is close. That's a good way..... but if it's just a tooth off, it may be hard to see.
The deal with it not being able to rev up..... I don't know. Stan, as many motors as you have worked on I think you should be able to judge RPM, so I trust your guess. I agree that timing is possible. So is lack of fuel, but since you have switched carbs with no change, then it would have to be a supply issue, which is possible, but unlikely with the other symptoms. Cam timing seems to be the only next logical step with the diagnosis you have done. Just not much more could be wrong.
Vacuum leak is possible, and would cause the same symptoms, but it seems unlikely as there are only 3 gaskets to leak, and they are all new. I have seen warped parts though that wouldn't seal. Your leak check with brake cleaner should have yielded a result if there was an issue though.
I'd still like to hear this thing running.
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