I bought a Sure Grip 8.25 out of an F-body from a guy on Craigslist, cost me $300 to buy, I was in it for less than $1000 by the time I got it installed in the car (spring perch relocation, brakes, wheels/tires) Overall it was well worth the investment, better traction, I got more aggressive gears, and more beefiness than the 7.25 I started with
