Have never built a header, but doesn't look like it would be too bad. The question... could a header be brazed rather than welded? Don't know how hot the gasses are coming out of the exhaust ports of a TR7 but have seen cast iron exhaust manifolds brazed before when cracked and they seemed to work ok. I have a lot more confidence in my brazing than welding at this point in my old age: hence the question. Besides, if I got an angle wrong when fabricating I could just unglue it with the torch and start over. Anyone know if brazing it up rather than welding works?