[Tom Howland]

I find this thread very interesting. My rear left carb is different by 1 number (5-6). I built a flow bench to dial in the carb by twisting the shaft when not on the engine. When I flowed the carb I had the same reading on both throats. So that means the intake manifold flows different, or the valves, or the piston rings.
Would then the best thing to do is twist the shaft checking flow with the engine running? I guess thats the most important flow, engine running.