These are the ones from Quick Performance for the 9". They have several adjustment holes. I have not installed them yet. I have been having tration problems with the 4.56 gear. I have installed adjustable uppers, I have boxed lowers, Moroso springs, Summit adjustable shocks, and control arm braces. I changed tires from a 26x11.50x15 to 27x10.50x15. Brand new tires. I took the car out this weekend for the first time since the changes were made and had horrible 60' times. Spinning all the way through first gear, had to peddle a couple of times. I was hoping the taller tire would help some. Only made 4 passes though. Would the pinion angle help with traction. What is the best way to set it? I have heard several different suggestions. At 97 MPH I should be 7.0's. Thanks.
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