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Re: Installing headers on a 69 Mach 1
Oh Boy....I have installed headers on several 69 and 70 cj Machs and it is a VERY difficult install. IE skinned nuckles. I currently have a 70 cj that I have keep the stock manifolds on due to the issues with headers.
My advise....port match the stock manifolds and clean up any burrs you can get at in the ports.
Put a good street cam in the car for the performance. Headers cook starters and mine always seemed to touch the body in various places.
Perhaps someone may chime in with a multi piece header set up that is better than the old school design. In any event...good luck.
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