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  1. #1
    axoiamthatiam is offline Junior Member
    Join Date
    Feb 2010
    Posts
    5

    Default 400 to 440 Headers

    I have a 400 engine in my 72 Challenger and was wondering if the headers I have now will fit a 440 engine if I upgrade to that or do I have to buy new headers? What about my 4 barrel carb, will I have to buy another intake manifold for the 440 or just put the one on the 400 onto the 440? please help and thank you

  2. #2
    73sixpack's Avatar
    73sixpack is offline Member
    Join Date
    Dec 2009
    Location
    South Dakota
    Posts
    46

    Default

    headers and carb. will be ok, but your 400 is a "B" block (I think 360?- late 383 and 400) so you'll need an intake for an "RB" (early 383-413-426 wedge-and 440)

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