Dana 30 Carriers

Im toying with ideas on which locker to use on my dana 30. If i decide to do a lockright, I know i will need a carrier. The question is what is the cutoff on the carriers. From what i read in magazines the smaller carrier Is for 3.54 and Numerically lower gears and the the other carrier is 3.73 and higher. Is this correct? The higher one is the one i need for my 410s. If this is correct, I know of a particular person in the club who just happens to have a 3.73 carrier laying around. Just want to make sure before i tear these things apart.
Thanks
Ed

Cool..I will take it then. Let me know if you want anything for it.
Ed