Originally Posted by cubbear
checked compression in all cylinders all cylinders the same @150 lbs books says 180 + or - 20lbs the plugs on the rear cylinders on rt and left appear to be blacker than the rest
This is a clue. Is the smoke black? That's unburned gas from those two cylinders. I'd check and rebuild your carb before I removed the intake though. While you have it off you can feel around in there with some light steel wire, but it would be unusual to have anything blocking two passages.