John,
Thanks for refreshing my memory about the straight linkage and the
manifold on the 56 Fury. You are the one who called that to my attention a while
back. Below is a photos of the straight linkage vs the progressive linkage
below and springs. Although no one is talking about it the springs themselves,
they are very important on the 2/4 bbl Fury's. The bottom spring must be twice
as big and have the long straight piece at one end so it does not increase
resistance as it pivots on the carburetor. Springs without the long straight
end build up resistance and can keep the carbs from getting full throttle.
>From my drag racing days I have learned that completely opening up all 4 holes
in the 2/4 manifold to one big opening for each carb gives you more power at
high RPM's and less power at low RPM's from a standing start. The guys that
did this who were mostly Chevy guys on the drag strip always had a
3.90--4.11-4.30 or 4.56 rear end ratio.
Ron
PS. What good is 2/4's if you are not getting full throttle.
PS 2 Thanks for the photo and Plymouth information sheet
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