Anybody want to school me on stall speed?

Sorry for hijacking PhillH

WJAJR and PoisonDart74 thanks for the insight, maybe I am thinking too much into this but this is the scenario. Dad bought a 67 cuda "S" 273. It came with 2 torque converters, 1 the factory orig and a fairly new one that was hooked to a 400hp 360. STD Non commando pistons in it. We put new cam, lifters, springs, timing chain and gears. It came time to install engine but we had to pick a torq conv. Which one?? I know the new cam and more play a role in picking a torq conv BUT the new one.....unknown stall cuz it wasnt stamped on it anywhere. We went with the new one as it was behind a 400 hp 360....and we didnt go factory orig as the cam we installed was a little bigger than orig 273 commando specs. So we have a torq conv which is working fine but dont know the stall. Seems simple enough for torq conv mfg to hardstamp it into the bell or somewhere. Thanks for the insight guys!