Torque converter

Is your 318 modified, in any way? How much?
A torque converters stall/flash (should be called couple speed) is entirely dependent upon how much torque you put in it. For example: race converter companies want to know what your combination is exactly, BEFORE they will build you a TC.
I'd hate to see you make a mistake.
The B&M torque master is a towing converter. It will be very tight on a stock 318, looser on a stock 440.
If we can fill-in some of the 'blanks', it would be a lot easier to get you the right TC.