1966 273 4bbl trans k/d rod

I think if you find the end of the throttle linkage (not the kickdown) from a mid 70-s dodge van and screw it onto your existing 2 barrel kickdown rod, it might get you the length you need.

I actually cut and welded mine to get the extra length, but in the process I noticed that the part from the 70's dodge van is longer and might just be long enough.

You also need a different bracket to hold the throttle cable. I had to make mine.

Here's a link to my thread.
http://www.forabodiesonly.com/mopar/showthread.php?p=1969613512#post1969613512