Headers?

Guys, I'm "researching" again.....I seen this:



And got to thinking, the motor in my truck is out, and it has regular ole manifolds on it, in pretty good shape, the question is, should I put headers on the 383 or leave it stock? Nothing wrong with the factory manifolds but. a few more ponies would be nice....Just thinkin on it, nothing signed in stone with blood............yet.

The headers in the pic are on a 318 "A" Poly Head.....I know, completely different but who makes headers like that? a lot of "rolls" in those pipes.....I bet those were a fun one to make! Those custom? Or does someone know of a place that makes them or something like them?