Without getting into the good rears I want to know more about the stock g-body rears and what else used 26 spline Axel's my 78 Cutlass has a stock rear with 2.56 gears I have a posi unit in my shed with 4.10 gears out of an S-10 will it work with like 3.23s I know it's a stage3 so that's the tallest it will take ideally I would like to have a 3.08 posi but I'm not trying to spend the cash right now. So that said clue me in guys I'm a bit confused and what's up with 2 different sizes toothpicks in these cars 7.5 and ??7.62??I'm lost and can't afford a 9" what's up?