Thread: tri carb linkage movement

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From the looks of it he put a hole there that goes into the lifter valley and the metal piece is a PVC valve (I suspect the hose swings around and connects to a 90 degree fitting in the base of the center carb). This was likely done so that holes did not have to be drilled into the vintage valve covers.

As far as linkage goes there are a couple of different options if you build your own. The first picture (an old picture of my FE Tri-power set up) works basically like the one shine shows. Personally like to have the lower linkage adjustable also. If the linkage is too long or short it can cause one or both of the end carbs to hang slightly open causing real idle tuning problems.

The second picture is what I’m running on my Hemi. It’s fashioned pretty much after the original 390/406 Ford Tri-Power setups.