I have a few shots here: Original 67 Pix (Then look at the next few shots..)
But I don't think these show the kick down. I have a 67 also, with the stock Rod Arm linkage, and have a TH400 and have not as of yet installed the electric kick down switch. (for the TH350 I believe it's a cable set up)
But for now maybe these linkage pix will help a little? I hope?