323 355 or 373 gears??

Murray said
Dana is way over-kill, save some money here. My car, 3.55 w/ 14" tires= 3100 RPM at 65mph. Who goes 65mph anymore? You might want to consider 3.23.

Strike one and 2...

Dana's are cheaper and stronger. They are the way to go.

14" tires? That is the wheel diameter whick has ZERO bearing on the height of the tire or RPM at cruise speed.