340 Running super weird

No surprise it's going beyond the 34 degrees. They all do it. None of them limit the advance correctly and several people have told him about it and he refuses to believe it and refuses to correct it. This is why I keep recommending to weld the slots and file them back out to where you need them. .......not that any of that is your issue. I just wanted you to know you ain't the only one with that issue. They're all like that. I think you're on the right track with the compression test. Keep us posted.