Valve bodies w/PTKD interchange ?

You are correct about 64's having an internal cable for gear selection..except for trucks. The trucks had shifter on the dash. A cable was used from the shifter -to the tranny_ on top of the tranny were the more modern two lever arms (one for gear selection/ one for kick down..like most 67&up mopars use) So the truck were the first not to have internal gear selection cables.
And from what I've found out the early VB's do not have the correct porting for the PTKD kit. But I will check with A&A.
Ok. I know 66 and later units very well but not real very familiar with the earlier units. If A&A tells you the PTKD kit won't work finding a good used 727 VB shouldn't be a big issue. I might even have a good one out in the parts bin. Shoot me a pm if you'd like me to look