273-4 carb linkage 1967 Barracuda AT

Upper oval cut has the spring clip. Look to Immeidate right of #1 plug wire.
When you say "clamp" are you meaning bellcrank? Its the pivot point for Upper horizontal link and vertical link.
Mine is a 904
To 4spdragtop: Thanks for photos! I noticed your upper carb link (with oval cut-out) does NOT have spring clip in middle; 65Val has that and I also have such a clip on one of my parts (in photo). Could there be difference because I have 904 AT and yours is 4sp? One last mystery is what is correct "clamp", bolted to tranny housing, holding the vertical kick down arm and horizontal link to AT? Shown in Fig3 sent by Dart67. Can you photo yours? thanks again