Not a knock, but that's telling.
This experience with these heads i think was good for you. We all enter this hobby through different doors/levels. The x exh port is particular with shape and the j follows the same.
Thanks for sharing.
Lol, What it tells me is that I've never had a customer willing to pay me to work this type of head to this extent. Didnt hardly touch the exhaust ports with their gawd awful shape as is. I also figured this would hit the 500hp goal the customer mandated. J.Rob