I was looking into changing my gear ratio to 4.88 gears on my rig, I have a 10 bolt and a 12 bolt (ya ya I can't afford a dana60 so save it if that is your response). Now that we are past that, I saw anything past a 3.73 requires a new carrier? Is this correct? I believe highly my 78 k5 has 3.08 gears, it was originally an automatic/np203 truck. Now has a SM465/np205 thanks to me. If I need new carriers that sucks. Any info is greatly appreciated!