Your ride won't be any different. The engine will likely idle better when you put it in gear. If your not used to a stall you might think your tranny is slipping when you first take off and in higher gears at low speeds.
It helps your launch by getting your engine rpm's up to the power band of your cam.
You shouldn't need to change the tune of the car. Might have to lower the idle in gear if you had it higher before the stall to keep it running in gear.