Hi, I haven't found anyone that makes headers for the 97 heavy duty. I'm assuming that's due to something hooked to the stock manifolds for emissions. Does anyone know if shorty headers for a 96 250 could work for the 97 heavy duty and what modifications I would need to make to get them to work. I'd really appreciate if anyone can help with this as I'd really like to help the 5.8 motor breathe a bit easier. Thank you.