Hello all. Just bought this sweet 91 Roadmaster. Wanting to add long tube headers and dual exhaust but having a hard time locating vehicle specific headers. I’ve been told the same model Caprice headers for a 305 will work but I’m wondering how much modification (if any) is required. Hate to order some and get to the muffler shop abd they not fit. Muffler shop won’t source then for me like I had hoped. Anyone have any direction they’re willing to provide?