I have been slowly roughing in the tubes with mild steel. They are looking pretty good so far I think. The primaries are 1 7/8 stepped to 2 inch with a 3 1/2 collector outlet. This should wake up the LS motor, although it may lose a little low end torque. And that may serve as a litlle traction control with a (roughly) 500hp motor (comparing it to simular builds) in a 2500 lb. car.
