Help me choose 6 or 8 bolt small block crankshaft?

Dibbons · Jun 16, 2017

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.

rumblefish360 · Jun 16, 2017

You can get a B&M flex plate for ether.

66Satellite47 · Jun 17, 2017

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

Hemirunner · Jun 18, 2017

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.

66Satellite47 · Jun 18, 2017

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.

Help me choose 6 or 8 bolt small block crankshaft?

Moper 305 crankshaft profile recommended?

6 bolt

8 bolt

Doesn't really matter

Dibbons

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rumblefish360

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66Satellite47

Well-Known Member

Hemirunner

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66Satellite47

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