That is what I thought, now if they actually have a TH-350 or TH-400 that they have the 2 speed shifter hooked to then they would need a vacuum line as the transmission will not shift into 1st gear until you go to a compete stop and the mechanical linkage will not work on either of those transmission. You would still be able to manually shift between 2nd and 3rd gear.It should only be using a kick down linkage. I don't recall a vacuum line to the transmission on my 64.
From the modulator vacuum line up to the T connection under the hood. One line to the rear of the carburetor not the intake manifold. The other line to the advance on the distributor it’s a small round cone shape. Do you need a small channel lock pliers to remove the nut on the modulator at the tranny. It is normal for trans fluid to come out of the outlet call when you remove connect it. You can install a rubber hose to attach it to the metal line. This is ok. Scott 63I am missing the vacuum line that attaches to vacuum modulator valve in the back to the transmission. I just ordered a new one but I'm not clear where this attaches under the hood. Any information would be helpful.