anybody make their own headers??

i m restoring a 72 demon 340 and i m thinking about making my own 304 stainless headers. i m just looking for some ideas. they make kits from a few different companies that i can piece them together. i know i can do it...i m just looking for other examples or hints from the guys who ve actually built their own headers. any hints on which company sells good kits,etc. thanks.