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Thread: more mopar 340

  1. #1
    Junior Member SHOW GUEST
    Join Date
    May 2007
    Posts
    6

    more mopar 340

    more ?'s about my son's duster--will the 727 & converter that is behind our 340 now work with a 360? i know a 360 is externally balanced,does this require an externally balanced converter?--also what is the significance of "j" heads?,the combustion chambers & valves are the same size,no one can seem to tell me what the majic "j" means
    thx. Jeff

  2. #2
    Yes the converter needs to be balanced, A tranny shop charged me $25.00 a couple of years ago. The "J" head is the 340 4bbl head 72 and later, it is also the same head, casting #'s and all as the 360 4bbl head which was introduced in 72

  3. #3
    Senior Member RACING JUNKIE mopar1968's Avatar
    Join Date
    Dec 2006
    Location
    Abingdon,Virginia
    Posts
    3,579

    340

    Yes it will, contact summit b/m makes a flex plate for this, just done this very thing. part number bmm-10236

  4. Racing Junk


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