When we installed a 523hp Dart small-block in our 1968 Chevy Nova project car, we pulled the pin on the grenade that was the original rearaxle. While it was fun doing peg leg burnouts on the ancient tires our Nova came with, we’ve since stepped up to a pair of 255/40R17 NittoNT01s on the back. Horsepower and traction equal broken parts in between. So before we scattered the old 10-bolt axle, we decided to do the right thing and build a rear axle that will take the abuse.