Help me choose 6 or 8 bolt small block crankshaft?

Daytona - Superbird Forum

Moper 305 crankshaft profile recommended?

Poll closed Friday at 10:28 PM.
  1. 6 bolt

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  2. 8 bolt

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  3. Doesn't really matter

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  1. Dibbons

    Dibbons Well-Known Member

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    My Super Satellite project ('72 Plymouth Satellite Sebring Plus conversion to Superbird/Supersatellite) needs a 305 Mopar motor before I fabricate the wing and nose. Can't find a 1970 Trans AM Mopar 305 crankshaft so I will just have to have the 2.96 stroke crankshaft special ordered. Wonder whether I should specify a 6 or 8 bolt configuration, will be using 904 automatic. Thank you.
     
  2. rumblefish360

    rumblefish360 Well-Known Member

    My Photo Garage
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    You can get a B&M flex plate for ether.
     
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    • 66Satellite47

      66Satellite47 Well-Known Member

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      Six bolts seem to hold up to lots of torque & power. Just use good bolts. LOL
       
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      • Hemirunner

        Hemirunner Well-Known Member

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        With that stroke, it isn't going to make enough torque to stress either. I'd be looking for good heads and a 5.13 gear so you can get enough rpm to make any power.
         
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        • 66Satellite47

          66Satellite47 Well-Known Member

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          BTW I've had several 440 + motors at about 600 HP with 6 bolt cranks. The six bolts were never the problem, just the factory crank and my excessive RPM.