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If you can borrow the 2 circuit then give it a try. If it is setup up close for your combination it might just work.
You can also make some changes to your 3 circuit. It is best to have a wide band to set up a 3 circuit but you can do it old school also. One easy thing to try is to remove the intermediate air bleeds and see how it runs. Holley left the air bleeds out on some 3 circuit carbs. You can also reduce the jet size on the intermediate circuit just to see how it works. Every 3 circuit that I've ever worked on was dead rich in the intermediate circuit and needed to be leaned out a ton.
That is exactly what I was thinking. In the process of installing the new Racepak data logger so I will have air fuel ratio monitoring next time out.
With the 80 intermediate air bleeds in the carb now I think I am WAY rich and that is why the car works so much better on the launch as the weather gets cooler.
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
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