Seems I may owe you an apology; in response to your troubles with Rymal I did some digging and found he has managed to create quite a collection of unhappy customers, not just with chokes. Reproduction Buick valve covers fraudulently sold as NOS at inflated prices, fuel pumps sent in for rebuild that come back visually trashed, that kind of thing. All of this is thirdhand via the internet, of course, but beyond a certain volume of complaints it makes you go "H'mmmm". Damn sad when good vendors go bad.
For now, I am withdrawing my recommendation to shop with Rymal. I did call him up and he said he thinks I might be telling people to order the wrong kit. That'd be odd, because it's the kit I've been ordering, but per his request I've sent him an e-mail with the various p/ns I have on file for the various slant-6 chokes, and he said he'd look at it and correct it if necessary. We'll see what comes back. For what it's worth, I contacted CarbsOnly (see this post) and they report they have five of the #1232 kit in stock at $39.As for your question of where (clock position) the tension should start: Impossible to answer.