After a complete check of everything. I have decided to throw in the towel on this one. After checking and rechecking the valve lash, gaskets, ground stud, jets and (3) carbs. This thing is junkpile material. The only thing I have not done is disconnect the rev limiter. It seems when you give it gas at about 3,000 rpm it sounds like it's choking on too much fuel and it won't "lean out" and run steady. I have no clue. Thanks for the help. Maybe someone at Monroe can do something with this possible mailbox holder, I know I can't.