Stall?

The best thing you can do, is call reputable converter builders, and give them all the info, about the engine, and car. Let them tell you what you should have. But don't lie to them.
I couldn't agree more. GIVE whoever you call, ALL information on what you've got, and what you intend to do with your car. Most if not all performance converter builders have a spec sheet on their websites that give you an idea as to the information they want. Don't give them false information, or your converter will not turn out the way you want or expect. I spent a lot of years in the industry, and have seen the results of over exagerating your combination. Never a good thing.