torque converter question

Engine torque determines the stall speed of a given converter. Example:
My Valiant with a 9 1/2 inch converter will stall at about 3200 with the 170 engine, and about 3800-3900 with the 225 engine (same converter).
You can determine whether the trans is a LU or not, by getting the numbers off the edge of the trans pan rail. My Mopar.com has a trans decoder chart.
As for the B&M converter it will probably stall less then 1900, as most stated stall speeds for converters are rated for V-8 engines, and the slant six will have less input torque, so therefore a lower stall speed.