We installed a complete Bowtie OD stage two kit in a 67 Camaro 350, with a 650 Thunder carb on the engine. This included their Edel carb TV setup. I was newer happy with the way the car progressed through the shifts and downshifted.
Could never get the engine to run well on the street with the Thunder carb and have since swapped the Air Gap intake for a Edel RPM spreadbore and I built a Qjet for him. No matter what jets, primary rods, springs, and even bought new venturi and did some modifying of the idle circuit to get that Thunder to run better in the part throttle and power circuits. The conclusion was the Thunder doesn't like a cold intake manifold, big cam(Comp 278 roller), and engine vacuum on the low side at idle.
Back to the trans TV cable to carb question. Initially I built a 1972 qjet for install on his car. It didn't have a TV cable hookup so I welded one onto the carb using this info supplied from here:http://www.tciauto.com/Instructions/Files/gm_tv_cable_adjust.pdf
Another similar info is here:http://www.cpttransmission.com/Files/tec2.jpg
What we found was the Bowtie TV carb bracket installed on the Thunder carb was less than ideal for proper TV operation. The first PDF above is what GM uses for TV cable positioning. Measured several Qjets from 200R and 700R vehicles which confirmed the TV point on the carb needs to be 1.016 to 1.125" from the throttle shaft center, and about 22-25 degrees rearward. The Bowtie is only about 10 degrees rearward and I believe not close to 1.125" from the center. This changes the pull on the cable due to the arc of the pivot point, which changes the pressure in the trans at different throttle positions.
We only did a preliminary drive in the car since the manifold/carb swap, due to the over abundance of nuisance snow here in the East, but the trans behaves much better, shifting and downshifting is much improved. In Dec I built him a 1980, 17080298, Qjet with stock TV hookup, this is now on the car.
Didn't want to rant to long on this but know that the TV attachment to the carb is crucial to proper 200R shifting. Bowtie is very specific on monitoring the trans pressure when the trans is first installed. We monitor trans pressure via a temporary pressure gauge in the car. Hopefully the weather will get better here and more testing can be done soon.