Pitching the stock differential out from under a GM car in favor of a 9-inch Ford has always been the best way to step up the drivetrain for drag racing. Since the price of used 12-bolts has ...
There was a time when you had to know about a well-stocked junkyard to find a 9-inch Ford rearend for a vintage Mustang. Even then, finding a 9-inch rear axle that fit wasn't easy because only a small ...