I own a 1986 C-10, which I have planned to make a 6.0 bored to 408 swap, and a fuel inyection conversion, a 4L80 tranny and a radix supercharger, I think that the numbers should be close to 580 HP at the rear wheels and the same amount of torque, the only thing I don`t know is: what diff can handle the power without having to be rapaired every 2 weeks. I`ll appreciate your help guys.