Still having a blast working on my 67 Since I am going to keep the 2V carb, I want to connect the air cleaner and snorkel the way they are supposed to be. Since the stud on the exhaust manifold that holds the snorkel is broken off I am planning to drill it out and tapping new threads. As anyone done this? Are there any special considerations for drilling or tapping into cast iron? Thanks for the :1zhelp: !!