No hassle headers for 66 dart w/360?

Please forgive me if this is an idiotic question. If the fenderwells are the issue why can't you modify them? Would that give the front wheels not enough room to reach full lock? Or is everyone just wanting to keep the stock wheelwells? I'm asking because I simply don't know. My car doesn't even have wheels on it yetlol.

I used Hookers in 75, as earlier stated. They were the only game it town. It was over 4 decades ago, so I don't recall the number. All the tubes went on the outside of the frame. They were designed for Go-Fast racers with big tires on the back and tall skinny front runners up. And it's all straight line driving......pretty much. And for this application they probably worked well.
For me, I just wanted an exhaust on my car so I could drive it. Remember I was about 22. With the skinny 13s that were on the car when I got it, this combo seemed to work fine. I can't even remember if the tires ever rubbed. It's just too long ago.
But a taller wider radial, I'm pretty sure wouldda got to rubbing. Now I could have maybe moved the tire outboard with a lesser backspace, but that I know,now, wouldda upset the scrub radius, and then the steering wouldda got funky. There is no cheap easy solution to this problem, with those old-style headers.

As to the 5208s, I too am waiting to hear from experienced installers. I have heard that one or perhaps two pipes , go down between the engine and the frame and the rest on the outer side of the frame. That sounds very good to me. And I really would like to see that, and to hear about if those outer pipes interfere with say 235/60-14s on a zero-offset 7 inch wheels. Or what their owners HAD to use for tires and wheels to make it work. I would never run those skinny 13" bias plys again,lol.
As to hooking the collectors to the exhaust, I would be prepared to cut them off if I had to and re-engineer the turn to underchassis exhaust. That seems like peanuts, compared to building an entire header from scratch.

oh wait, I don't even have an early A. Still, you know, this information would get bookmarked..........just in case. A wagon again, with a working tailgate,would do it for me.