S. California Transmission Shop
I had a full pro job done on my 727 through Bob Lambeck a former MOPAR drag racer. He had a place in Lancaster rebuild mine. I constantly launch at 400+ foot pounds of torque and its been fine for over 8 years. It has taken a lot of abuse and is still tight.
The name of the shop is either AA or AAA Transmissions in Lancaster. If you need I can call up Bob and find out their phone number.