[Silverback51]

I guess I better qualify my earlier statements.

I really like the control that you have with mechanical secondaries.

My problem was I went with the 660 center squirters. No provisions for power valves.

These carbs were designed for one thing. Drag racing. Either idle up to the line, or full throttle for 10+ seconds.

If there was a viable mechanical secondary carb option I would probably go with it. But to my knowledge it does not exist.