I have described this process in a prior posting. It's not that bad, if you have an arc welder, and take your time. The Stovebolt exhaust manifolds are gorgeous, but since they do not connect with the intake, you have to provide an alternate source of heat to the carb base if you're running gasoline. If you'd like to contact me at teunisjw@yahoo.com, I will describe the procedure to you. Or maybe I could be talked into selling the split manifold I just took off my 230.