what transmission to use with new hemi 5.7

I've owned 3 srt8 cars myself and I can tell you the 5.7 isn't enough power to put the nag1 in the right gear. Its superb behind the 6.1 and even better behind the 6.4.

Morale of the story...if your putting a stock 5.7 in your car, 545 will work fine. Your car will make 260-280 to the tires and run for a long time.

If your doing anything performance wise, there are better options