hey all, right now i have 4.56's at both ends. this is totally impractical for my 454, sm465 on the street. i top out at 60 with a cruise RPM of over 3000, way too much for my torque monster big block. right now i am thinking of the long run, i want to put 3.73 gears in instead. will yukon 3.73 gears fit in a Dana 60 (military surplus w/ posi) that originally had 4.56's? would i need reverse rotation for the front? i am not sure about all this. i also wanted to make sure the rear R&P from yukon would work with my detroit locker in the 14bff. if theres any confusion, i have: Dana 60 4.56 posi (front) Gm 14bff 4.56 detroit (rear) i want: Dana 60 3.73 posi (front) Gm 14bff 3.73 detroit (rear) PS. what should i expect to pay for installation? i am a very good mechanic when it comes to trucks, but i dont trust myself with gears.