I am about at my wits end with my engine. Got it in the new chassis, started right up, but it will not rev up past quarter throttle. Not with one engine but with two different engines.Checked the flywheel key and replaced with a new. The things that interchanged between the two were the flywheel (stock), the head, and the carb and intake. Both are doing the same thing. I have put another carb and intake (from a known good running engine), different flywheel, coil, and fuel pump with nothing working. Have double checked valves and tore the oil pan off to check timing marks. The engine is ungoverened. Anything that I am missing??
Any ideas would help. Thanks, Craig