Fierofly

Are ALL M96 Transmission final drive ratio's the same? Can you tell by the part number of the transmission if it has a LSD installed? I'm trying to get the tallest final drive ratio, LSD M96 Transmission that was available that will fit in a C4S that has been converted to GM LS3 480hp 2wd and I'd like to bring my top speed RPM's down as cheap as possible for now with the intent of installing a G50 sometime in the future, when I have big funds available, LOL