another 727 question

heres one that has me going crazy. a 340 with a 727. the throttle pressure linkage appears to be correct and working properly, yet the shifts are real late acting like to much t.v. any adjusting dosnt change anything. ive tryed three different valve bodys and two govenors. even changed the pump and front drum. still no change. and heres the kicker, removing the linkage from the carb dosnt change anything, still late. any ideas. all are welcome.