Slant 6 engine builder in Ca?

Slant 6 Engines

  1. RogerCox

    RogerCox Well-Known Member

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    Motive gear who makes the only gears for 7.25 is discontinuing there line, so ended up having to buy one of there last 4:10’s.
    Hope it not to steep! Glad it will add some pep to my /6, but I feel like it’s ganna shift 3 times before 25mph haha.
     
  2. RustyRatRod

    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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    You can control all that. With the tall tire you have, it won't be that bad. It'll be quite fun around town.
     
  3. RogerCox

    RogerCox Well-Known Member

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    yup true!

    got the gear vendor ordered up for my 74 duster!

    Engine is BP 408 (465hp) Dana 60 end. Gear vendor recommended 355 gears, I was think 3:73 haha what do you think?
     
  4. Brooks James

    Brooks James VET, CPT, Huey Medevac Pilot FABO Gold Member

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    Easiest cheapest way put a 100 hp shot of gas on it
     
  5. RustyRatRod

    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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    That 408 could pull a 2.45 gear.
     
  6. Charrlie_S

    Charrlie_S Well-Known Member

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    Piker! I've done over 200 HP on a stock rotating assy.
     
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    • volaredon

      volaredon Well-Known Member

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      Not enough different from 3.55 to 3.73, splitting hairs there, if I had one I wouldn't go through the work to change to the other ratio.
       
    • RogerCox

      RogerCox Well-Known Member

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      that what I thought to! I have to rebuild the Dana 60 anyways. I was thinking 3:73 at least but the Nick @ gear vendor said 80% of people would run 3:55. Would 3:73 be to jumpy to drive in the street?
       
    • volaredon

      volaredon Well-Known Member

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      No more really than 3.55s
       
    • RustyRatRod

      RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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      If I were to use any style of overdrive, my minimum choice for gears would be 4.10.
       
    • RogerCox

      RogerCox Well-Known Member

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      with 4:10 gears and over drive in in third gear OD would be equivalent to 2:78 gears ya?

      4:10 gears would make my trans shift to much before reach even like 30mph would it? 727 3 speed auto. Sorry so many questions but with the Dana 60 I have to take the whole axle out to change gears so would like to get it right the first go around.
       
    • volaredon

      volaredon Well-Known Member

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      What kind of vehicle?
      I did my son's dana 60 while it was still fully bolted in his truck.
       
    • RogerCox

      RogerCox Well-Known Member

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      1974 duster
       
    • volaredon

      volaredon Well-Known Member

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      Wow talk about Overkill //sure it's a dana 60?
       
    • RogerCox

      RogerCox Well-Known Member

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      sorry forgot this thread was about my 67 cuda haha. It’s a slant 6 7.25 rear, will be easily able to change gears. All I could find are 4:10’s for that axle so I’ll be putting those in and report back
       
    • volaredon

      volaredon Well-Known Member

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      Id be upgrading that 7-1/4. No need for Dana 60 for sure but an 8-1/4 or 8-3/4 would be much better if you are adding any "more power" to that engine.
      at a minimum Id be looking for a Sure Grip for it to spread the load out to both wheels..... maybe look for another 7-1/4 that has one and if out of a different series of car, swap the guts in. Unless I was adding some kind of overdrive I sure would not be stepping all the way to a 4.10. what ratio in there now?
       
    • Charrlie_S

      Charrlie_S Well-Known Member

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      I wouldn't spend the money on a 7 1/4. As you have found out, not much in the way of parts availability, any longer.
       
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