Big Block Kickdown Linkage

Is there a difference between the A- body kickdown linkage and B and C bodies? My car is a 1968 Barracuda that I am putting a 400 in. The Barracuda has a floor shift auto and I have the linkage for that part. The transmission and the linkage I have is from a 1968 Chrysler Newport that had a 383 with a 2 bbl.

I can't remember where but I thought I read that someone was selling a part for the transmission that would add part throttle kickdown to the 727. 1968 transmission only kicks down at wide open throttle. Anyone know what I'm talking about?
U need the 4 bbl bracket for the intake or modify your 2 bbl bracket. Also the top rod to the carb is also different. The PTKD can be found on 71 and newer valve bodies. I have a few. Kim