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headers may disapate heat when your sitting with the hood up in your driveway . But take your heat gun and crawl under the hood with it closed running down the road and see what happens. Yes all race cars run headers but they dont run mufflers either.
Verry nice car. Mopar muscle did a test years ago on headers vs mopar hp manifolds and there was not that much differnce plus the heat that headers put out under the hood. I wish I could rember what year it was they did that test, With the way things have changed it may not be the same. I myself...
Look in Pittsburgh under parts put in mopar parts guy has one from 67 Charger right close to me. wants 45 for it and other parts. Let me know if I can help you.
I would find a shop or person who knows mopars and rebuild. Someone who knows 727 trans can do a lot with a trans by adding clutch packs and pumps for alot less than I could buy one. I have always been lucky to have a good mopar trans guy.
If your 400 is good you can put a magum cam a 4bbl and headers and if you get the heads shaved you can get your compresion ratio up to about 10 to 1. I did it to a 1977 motor and it runs pretty good. you might have a set of hp exhaust manifolds now. Take a pic of them I can tell to look at them...
Is the 400 a HP motor if it is a 2bbl the only differnce between the 2bbl and the hp is the cam the 4bbl intake and carb and the hp exhaust manifolds. The 72 manifolds should work. I have used 72 manifolds on a 73 big block. You can cross check the manifold numbers.
For sale 1967 GTX 440 auto 323 sure grip. Ca rust free car. Car was redone in 2013 was working to repair scratches on hood and lower rear quarter panel,that is why primer is on those parts. No rust but car needs some work. Car runs and drives has been in storage due to health. Found a car I want...