Need help with 1964 Dodge Dart 225 Slant Six (Been with the family since 1966!)

Anyone near the south Dallas Midlothian area that can help me with the Torqueflite Transmission, Kick-down linkage? My dad had an electronic ignition system installed but the Torqueflite no longer drops down into passing gear when punched or automatically drops down into a lower range when going up a hill.