ques about topend swap

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  • geldartb
    The Situation
    • May 2004
    • 1994

    #1

    ques about topend swap

    i used the search but could truely find what i was looking for.
    ok i want to do the 3400 topend swap on my 3100 but i cant find anything that specifically says what ill need to complete. i know i need the LIM\UIM\and tb but do i need heads and all those goodies. anybody that can put me together a list with what i need would be a great help thanks.
    sigpic
    99 Grand Am GT
    3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
    Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
    1357 cam 227 233 .050 dur
    515 515 lift 112 lsa
    15.232@88.85mph on stock 3400---New time to come


  • geoffinbc
    Iron Head Enthusiast
    • Oct 2003
    • 5831

    #2
    Yes you need to change heads.

    Looke here http://www.domesticcrew.com/660/ and look under the hybrid swap.
    1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
    1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
    Because... I am, CANADIAN

    Comment

    • bszopi
      Site Coder
      • Apr 2000
      • 9190

      #3
      You don't necessary have to change the heads when going from a 3100 to 3400. I never did. The ports don't line up 100%, but neither did the original ports.
      -Brad-
      89 Mustang : Future 60V6 Power

      Follow the build -> http://www.3x00swap.com/index.php?page=mustang-blog

      Comment

      • geoffinbc
        Iron Head Enthusiast
        • Oct 2003
        • 5831

        #4
        Ahhh sorry I was thing 3.1L to 3X00.

        Well you dont HAVE to but I would. Look around and if you can find an engine core (because the cranks go bad on alot of motors cuz leaking coolant was a big problem) then you can geat heads real cheep.
        1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
        1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
        Because... I am, CANADIAN

        Comment

        • geldartb
          The Situation
          • May 2004
          • 1994

          #5
          sweet exactly what i was looking for thanks guys, i was just going to replace the lower intake manifold with the same one but if i can get something that will give me little more power for the same cost why not do that.
          sigpic
          99 Grand Am GT
          3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
          Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
          1357 cam 227 233 .050 dur
          515 515 lift 112 lsa
          15.232@88.85mph on stock 3400---New time to come


          Comment

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