I'd find an old Treuhaft header. It has cast flanges & collector, and the factory heat boxes by #2 & 4. It is the exact same as the old EMPI four bolt, but it's a 12 o'clock 3 bolt collector. Virtually indestructible.
If I had it my way, that's how they'd be making them still today... Scat made those style headers in the early '80s too, I think...
The original poster didn't suggest a price range/budget, but I'm thinking an original old school Treuhaft system would likely fetch a pretty penny, depending on the seller!
