Help me identify Direct Connection headers

So some days at the swap meet are better than others. I'm tootling along in the big Portland swap meet looking for the one Mopar part among thousands of Ford and Chevy pieces and there's a little used set of what appear to be A-body race headers. They all come apart with slip tubes and the little bolt tabs, they've obviously been on an engine and run some, but there's no rust and no road rash on the bottom. They have some dents like from being hauled around in a pickup and one small crack that can be accessed for repair inside the head flange, so I ask what the story is. The guy says he bought several sets of headers from a out of business machine shop that ran in engines on a stand for break in. So I pick them up for... wait for it.... $50!!! They intigue me because one side looks like my Headman Hussler race header in my race car with one tube in the fenderwell, but the other side has this bizarre up in the air loop to get the length for the tube. So I'm puttying them in the car to go home and I'm looking for a part number or give away that says who made them and there it is - Dirct Connection with the two little arrow stamped on one of the pipes!

So picture are below. Can a racer from back in the day tell me anything about them: when sold, who made 'em, what they were intended for (I can't imagine anything but drag car with two driver's side front tubes going down through the K-frame). Anything you can tell me is appreciated, but otherwise just enjoy a bit of DC history!