A couple of years ago, I checked with Kook's Headers about a custom set of headers for my 65 Skylark with 300 ci engine. They said it would be around $ 2,200. I was lucky enough to find an old set from Poston's, and then had Brian Stone rework the driver's side to clear the clutch z-bar. He had already done it to 2 sets, so knew exactly what to do.