4 speed conversion help

Engine, Trans & Driveline

  1. madmopar

    madmopar Well-Known Member

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    A few questions for the 4 speed experts. So I'm in the process of converting my 68 charger from a 318 /904 to big block 4 speed. I've been collecting parts for the conversion for some time now and have started since I seem to have a bit more free time now. First question is the shift fork, not sure if I have the correct one. The bellhousing is an 11" P# 2892262, I attached a pic of my current fork with an appox. overall length of 11 1/2 ish". Is this correct? Seems everywhere I look online they are 10 1/2 or 12 1/2 with no mention of a 68 b body. The other question about the shift rods and levers. The trans unit I have is a A833 OD that fits perfectly into the bellhousing (I believe the bearing retainer has been turned down). Just not sure on what rods and levers to use. The trans did not include any levers. Can I just order a set of rods and levers for a 68 b body? or do they have to be specific for an OD unit?

    20201227_160251.jpg
     
  2. Fran Blacker

    Fran Blacker FBBO Gold Member FBBO Gold Member

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    Can't help with fork. ba.JPG ba1.JPG This part of the process of mating a bellhousing.
     
  3. Thrashingcows

    Thrashingcows Well-Known Member

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    You can order a set of shift rods for a B-body, just the 3/4 lever on the tranny will need to be flipped since the OD is actually 3rd gear. so with the stock rods and shifter you need the linkage to hit 4th in the tranny for 3rd gear, and then 4th will be 3rd gear in the tranny.
     
  4. madmopar

    madmopar Well-Known Member

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    Ok so b body rods and levers just flip the 3/4 lever?
    Will this shifter work? Its a hurst 3914076? Sorry for all the questions, never had any experience with a manual transmission before kinda learning as I go.

    20201227_195207.jpg
     
  5. Jeremiah

    Jeremiah Well-Known Member

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    That is a 10.5" clutch fork.

    Get a new Hurst shifter, you will thank me.
     
  6. #41

    #41 Well-Known Member

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    On my 72 I used stock rods and levers on the OD trans and everything worked fine.
     
  7. eldubb440

    eldubb440 more miracles than Jesus FBBO Gold Member

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    do you have this bracket?

    zbzarhole2.jpg
     
  8. madmopar

    madmopar Well-Known Member

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    Yes already welded in.
    Really? its supposedly for 68 b bodies.
     
  9. Jeremiah

    Jeremiah Well-Known Member

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    I prefer the Hurst shifter. If you are after authenticity buy a Hurst mechanism that accepts the Inlamd handle from Brewers. Just one guy's opinion.
     
    • Agree Agree x 1
    • tallhair

      tallhair Rufus "Mod-hair" Firefly Staff Member

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      Will be WAY more enjoyable to drive.

      but it appears he already has a hurst shifter, so appears he planning on using it.
       
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      • madmopar

        madmopar Well-Known Member

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        Wasn't really planning for authenticity just yet and may consider it in the near future. What about the fork? Will this 10 1/2 be ok with my bellhousing?
         
      • tallhair

        tallhair Rufus "Mod-hair" Firefly Staff Member

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      • Sahara

        Sahara FBBO Gold Member FBBO Gold Member

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        Following
         
      • tallhair

        tallhair Rufus "Mod-hair" Firefly Staff Member

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        Btw, I once changed a 70 RR from 10.5 stock bell housing / flywheel etc to 68 11”. Used the same clutch fork.
         
      • madmopar

        madmopar Well-Known Member

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        Its pouring cats and dogs out today. Tomorrow I'll dig out the throwout bearing, bell and trans and mock up the fork and post some pics of its fitment. If the rain lets up then maybe later today.
         
      • Thrashingcows

        Thrashingcows Well-Known Member

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        You have a Hurst Competition shifter....if it's in good shape then I'd just run it, if it has any questionable issues I'd send it off to be rebuilt.

        Just hook up the rods and lever the way a stock set-up would be, then unbolt the 3/4 lever off the tranny and flip it 180*.
         
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