It's a friggen 302. If you knew what you were doing, you wouldn't have to ask this question, or you would have already read on the mustang boards and found a dozen other bottle fed 302s. That's why I asked you what your background was, your question was dubious to begin with. I have a brother who is a welder, a damn good one at that, but I still don't poop headers. Heck, my other brother is a computer programmer, but you don't see skynet in my living room do you? I was a mechanic for years, but it is still JUST AS MUCH work for me to change my oil, and I am a mathematician now, but 1+1 still equals 2.
Heck, every guy who comes onto this site and talks about building a set of headers has a brother/uncle/cousin/dad/neighbor/roommate's mother's second cousin's nephew's friend's baby daddy that is a welder. See a trend here? If you are going to make a set, don't tell us why you can do it, just go do it.