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1 BBL Carb Differences ??

Discussion in '40- & 55-Series Tech' started by rgentry, Aug 7, 2003.

  1. rgentry

    rgentry

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    Can anyone detail the differences between the 1 BBL carbs
    that were used from '58 to '67 and from '68 to mid '69?

    Thanks.
     
  2. Landpimp

    Landpimp GOLD Star

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    I have both a 65 and a 68, the 65 has a BIG sight glass and is different in how it hooks up. They are not a direct swap, but it could be done, I recall the fuel inlets are different and the hard line will have to be modified, a few other diffs as well

    the 68 has a small sight glass.

    the floats for both are the same, both brass and will swap, you can not get new floats.

    I have pics of both if you would like, will have to load em to my site latter.

    John H
     
  3. rgentry

    rgentry

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    Thanks John. I need a spare and saw one on EBAY but it is
    the earlier model -- not correct for my '68. I'll wait, as I'm
    sure there is one out there somewhere. The internals of the
    two carbs must be close to the same as they use the same
    rebuild kits.
     
  4. Landpimp

    Landpimp GOLD Star

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    pics of the pre 68
    http://pic4.picturetrail.com/VOL55/691553/1150072/31179501.jpg
    http://pic4.picturetrail.com/VOL55/691553/1150072/31179493.jpg
    http://pic4.picturetrail.com/VOL55/691553/1150072/31179483.jpg
    http://pic4.picturetrail.com/VOL55/691553/1150072/31179411.jpg
    http://pic4.picturetrail.com/VOL55/691553/1150072/31179407.jpg

    to be honest after looking at the pics I had, I think they would swap, but something must have been different or I would have swaped the whole carb insteed of just pulling the float out and using it in the 68 carb. Something was different, maybe the port for vuaccum or maybe it was that my 68 carb had some weird things done to it by the PO....like a cable throttle instead of the rod....

    John
     
  5. rgentry

    rgentry

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    Wow. That carb sure looks pretty. I know that my carb
    uses cable linkage and not rods. Also, it appears that
    the fast idle linkages is not on the SD40 at the same
    location as on my carb. Otherwise, they look the same.

    I know that my '68 came with an air pump (early
    emissions control strategy) and perhaps the carb
    change was made to accomodate the air pump
    system. I have only seen one or two '68's around
    with the air pump still in place.
     
  6. SuperDuperCruizer

    SuperDuperCruizer

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    65 single barrel carb picts

    Here's a couple more pictures of a 65 single barrel setup.

    http://filebox.vt.edu/users/rhedderl/My 65 OEM soft top FJ40/65FJ40carburetor1.JPG

    http://filebox.vt.edu/users/rhedderl/My 65 OEM soft top FJ40/65FJ40carburetor2.JPG

    http://filebox.vt.edu/users/rhedderl/My 65 OEM soft top FJ40/65FJ40engine2.JPG

    I no longer have the truck. I bought it for the factory soft top setup. If the floorboards weren't rusty, I would have kept it. I liked the simplicity of the engine compartment. The glass bowl fuel filter and the float bowl glass on the carb scored very high on the cool factor. Hope the picts help.

    SuperDuperCruizer
     
  7. rgentry

    rgentry

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    The pictures do help. Seems like I have a rod that goes from
    the choke down to the butterfly to give the vehicle some
    throttle when the choke is opened (the fast idle RPM is
    adjusted by bending the rod -- dumb). Anyway, I am not
    seeing this rod on the pre-68 carb's that you guys have.