Cheap headers...
I have a similar set, buddy wanted something different and sold me his old ones for $100. still in real nice shape. They fit in my blast cabinet so i gave them a cleanup and a few coats of high heat somethin or other, bbq paint? Dont remember. Been sitting and curing for 2 years.
was planning to use them in my 65, but im leaning towards using them in my dart instead.
Similar design, but i think they are flow tech.