Header identification.

I put the center two tubes in first, from the bottom, 1 and 2 in from the top, and the flange for 7 and 8 in thru the hole in the fender. Bolt on the collector. And I made flanges and welded them on the collector for an exhaust system. Easy way is to buy the flanges from summit. About ten bucks if I remember right.
Mine were starting to get rusty, so I sent em out for coating, all eight pieces.