The stall converter is built around the engine spec ( cam mainly ) and diff ratio. I wouldn't go anything other than stock for that configuration. You generally want the stall speed to be a tad higher than the start of your engines power band. Important for a street car is that the stall speed isn't so high that the converter never locks up. Rule of thumb i've always used is keep the stall speed under whatever the engine speed is at 60mph.
With those diff gears, your engine will rarely be over 3000rpm under normal conditions so your converter will be slipping way too much. Slipping causes alot of heat which will damage both the converter and the gear box.
I'd suggest getting a set of 3.55 gears, a mild cam and a 2500rpm converter.
