I also had headers when I was a kid and had the same bad
experences that you did. Is it even possible to make metal that thin? LOL That being said, I did help my son in law put a Gale Banks header on his Jeep Wrangler. This was a high Quality product that did not leak or rust away. It also fit perfectly with no trouble and was cheaper than a new stock unit IIRC. I don't know if it will clear your chassis but it is worth at least a look. My Father flew a plane for a hobby so I know what you mean about the mixture control. I always thought it interesting that to shut off the engine you pulled the lever out (leaning the mixture) until the engine died. Jay 6155