1966 273 4bbl trans k/d rod

Are you using the original head mounted top bellcrank, or switching to the later style 3 piece kickdown that mounts to the intake bolts and incorperates the throttle cable mount?? If you use the later style 3 piece setup you can use the 340 style upper rod and everything else from there down is standard stuff./ Thats what I did on my 66, and am going to do again for my other 66!! The top rod can be had, and maybe edit your post asking for the 340 upper rod, much easier to find!! Geof