Has anyone installed headers on their medium duty?

[lexadmn]

I need to install exhaust on my truck.

I have a nasty exhaust leak from a broken flange on one of the exhaust manifolds.
I have not had much luck finding a replacement manifold locally and decided installing headers is an easy way to go.

When I look for headers at some of the common websites, I can find nothing that includes any of the medium duty trucks. Am I looking in the wrong places?
I have searched many of the manufacturers as well, but to no avail. C30 is as large as they go.

I have read on this forum that pickup headers “should” fit, but I would prefer to know before ordering if possible. I have a bad habit of - if something I bought does not work or fit, toss it aside and never return it. Wife calls it "lazy". I dunno what she is talking about.

Many years ago (35 years ago??), I had a 72 C60 with a small block. It threw a rod and I replaced with a 454.
At that time, I had no problems finding a set of headers for that truck but I don’t remember where I ordered them from. But it was not challenging at the time.

Today, I have a 76 C60 with a 366 (among others), but can find nothing for any medium duty.

Does anyone know of anyplace to find correct headers?

KC