Okay, it seems like I have to keep my converter for a while...
This is what I got from Ultimate:

Hi Ulf, I would recommend our Billet 9.5 TF727 race converter for your application, approx. stall to be 38-4200. Great street manners also, it will drive very well on the street with no heat issues at all, but at WOT it will flash to the recommended stall speed, very quick and durable. This converter has a one piece billet front cover, furnace brazed and brazed on all the fin tips, triple bearing s, antiballooning flange on pump cover and alum stator with 8 element sprag. I also build these with billet stator and 10 strut Mechanical diodes. They come with a one year guarantee and one free stall adjustment , if needed. I build each converter myself per application, assuring you the right converter the first time, very important when going overseas. Your cost on the converter is $925, with the Mech diode set up, it is $1295 plus shipping. Thank you for your interest in Ultimate.

Thank You,
Lenny Croteau
Ultimate Converter Concepts
Phone: 704-892-6837