descent converter on the cheap?

I've got one even better since it's close to stock application: www.gopnh.com

They build quality OEM remanufactured units. Might want to give them a call and talk shop.

Usually you pick the stall that is +\- 500rpm above the beginning of your powerband.

You'll be happy!

PS some light reading:

http://autoresource.internetautoguide.com/selecting-right-stall-speed-torque-converter-1441.html