Hello Larry,
Stall speed is a tough one because there are so many factors. Here's a URL that might get you started:
Torque converter intro
Beyond that I'd suggest you go on line to the various torque converter mfrs. Most of them have a form you fill out and submit, and then they recommend a stall speed.
It'd be especially enlightening I suspect, to give several of them your specs and see if the recommendations come back similar
Here are a couple of mfrs to get you started:
Performance Automatic
Edge Racing
There are plenty of others too such as B&M, TCI etc etc.
Hope this helps!
Tom
PS: I ended up with the Edge unit after having problems with the TCI. So far, so good
