Stan, I'm the ONLY mechanic, but I'm not a mechanic. As I think you know, once I removed the rubber hose dropped into an inlet by IM, the engine was a different beast. It runs great now, but I think it might need a bigger spark since I'm still, on occasion, getting a bit of unburnt fuel hitting the exhaust. After my engine fire, I completely rebuilt the 44mm Webers, transferring everything into new bodies, even the venturys. How do you spell that? The pipe-like things above each inlet. NOT easy to get out. My exhaust.