Ok heres the deal, i got a 10" torque convertor a few months ago from my brother in law. Based on the dark blue color i'd take a guess and say B&M. What i need to know is what will the stall speed be? I'm currently getting my trans rebuilt and plan on putting the convertor in. the car is a daily driver. The trans is a turbo 350.

 

I'd suggest taking a look at the B&M catalog and see what stall the dark blue color means on a 10" PG/350/400 converter.

If they can't tell you that, based on what you've told us, then neither can we.