I tried to do it and it is a really complicated part to do. After a lot of thought I came to the conclusion that the ported stocker is best 1 because it flexes and would seal better after surfaced. Also the stocker does not transmit heat like the metal one does. I have chopped them up and tried to mate with the HD manifold and a few other things and still haven't found a good replacement for the stock ported. Replacing one every 5-6 years is no big expense and they do perform well.