Options for headers that fit well will vary somewhat by what year A-body you're working with. I could be mistaken, but I think the '68-72 cars have a few more header options that fit better than do the earlier cars. I know that for my '66, Doug's is just about the only option worth using. All the other options either require dinging a primary tube (not a big deal) and/or they hang down lower than needed and can cause ground clearance issues. I was in the same boat as you, where I wanted to use RARE oversized manifolds for my car, but after waiting over a year and a half for them to show up (and repeatedly being told they would ship "next week"), I cancelled my order and bought Doug's ceramic coated headers. They fit beautifully everywhere, and don't hang down too low. Installation was pretty easy from underneath the car.
Would I have been happy with RARE manifolds had I been able to get them? Yeah, very likely. But I'm also extremely pleased with the Doug's headers, so ultimately I'm happy with how things turned out.
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1966 Pontiac GTO ( restoration thread)
1998 BMW 328is ( track rat)
2023 Subaru Crosstrek Limited ( daily)
View my photos: Caught in the Wild
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