Hello Mark I am not sure what you mean by the engine being run on compressed air, but even so, you can check clearances of valves, cam chain tension, point gap and those things pointed out in the referred threads. You also want to dump the old gas out of the tank, check it for rust and put filters in the gas lines. Then before any further disassembly give it a try. Do not use a running car to boost it.
For me the hardest part of working on your carbs is getting them on and off. After a dozen or so times, it gets a bit better. If you take them apart carefully you can reuse the gaskets after cleaning. Read the threads about carb cleaning. Do not take both apart at the same time!!!!
Good luck
For me the hardest part of working on your carbs is getting them on and off. After a dozen or so times, it gets a bit better. If you take them apart carefully you can reuse the gaskets after cleaning. Read the threads about carb cleaning. Do not take both apart at the same time!!!!
Good luck