I would like to know how it would turn out for you. I had thought about it myself, for my slant build. I have a set of headers now, that won't fit my 65 Barracuda. Nice headers, looks to have never been run. got them from another member, who thought they would work, they won't clear my bell housing and clutch linkage. I even thought about modifying them, but it would be a bummer to cut perfectly good headers.
Torches, welder, and curiosity/sense of adventure. Ive made some body panels, I have done enough body work to not want to do any more! Never made headers, so there is the interest, and none are made for my truck, so why not?
yeah, the gag point threshold is where you want to light everything on fire.
When you start pukin your guts up in frustration.
The Jeep header/ steel exhaust manifold is what got me thinking that a header would be fun to modify/build...
That is a great and true philosophy.
That's what I think I'd do anyway. 
Last time I looked a set was like 800 bucks, and they only cover one tube size per kit. Awesome tool but unless you're building headers for a living it's overkill.
That's better but stull out of range for one offs in my opinion. That said I have two 3d printers I can knock them out in with some patience. nowhere near as good but for a couple of uses they'd be good enough.
$500 for the "kit", $300 for tubing, and flange., plus welding supplies. I think I will spend $600-$700 for "store bought" headers.
As sound as that logic is, when you have all the things and way too much "gumption" it's a hard challenge to pass on. lol. I've learned the hard way that sometimes it pays to spend.
What truck? Hi or lo mount starter? I know that Clifford shortys will work.
