What's easiest way to tell the difference between an 8.5 and a 8.2 rearend? Can you tell just by looking at the housing or do you have to look inside? I know that I can look up the numbers on the housing. A guy's got an ad for two part cars, a 72 and 73 Nova . He says the 72 is an SS. One car has an 8.2 and one an 8.5, I would think that the SS is an 8.5. I would just like to confirm for myself. Thanks