Non Mopar carburetor opinion

You know, you did mention you're running 22 initial in another thread, didn't you? Maybe with that mild cam in there, you're having to back out the idle screw so much to get it to idle down that you're running into problems (which was a possibility AJ mentioned above).

It does the same whether it has 4*, 12* or 22*. I certainly won't say it ain't timing, but I don't "think" it is.

And yes, it is up on 22 now. It runs the best it's run so far there.