I am getting to the point on my restoration project where I need to look at an exhaust system. The car is an original ’68 Z/28 with the 302 and non-power steering. I’d like to consider headers with 1 5/8 primary tubes that are ceramic coated in/out or are available black for after-market coating. Additionally, I’d like to upgrade to an after-market exhaust system i.e. Flowmaster or Borla which utilizes mandrel bent tubes and a crossover. Ideally, I’d like the new system to mount in the factory locations. I am kinda trying to get the best of both worlds, new technology for increased performance but maintain a somewhat stock appearance. I would greatly appreciate your comments and advice.