turbo'd engines arent exactly ideal for hill sprinting in my eyes, you want sumthing with instant power and loads of torque. twin 40's are an ideal way of delievering the power and a cam which aint to lairy and pulls from right at the bottom of the rev range throughout strongly. the gearbox is a very important part of hill sprinting and a low ratio box is a must. i no this is taking it to the extreme but still shouldnt cost that much. Good luck