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Cranks - 6 or 8 bolt pattern?

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Old Jun 30, 2019 | 12:22 AM
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Default Cranks - 6 or 8 bolt pattern?

Later model LS platforms have an 8-bolt pattern for the flywheel. Our cars have the 6-bolt.

Is there a benefit to be had with the 8 vs 6?

I wouldn't think so off hand.
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Old Jun 30, 2019 | 09:41 AM
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not that I know of, just makes things more difficult lol... I have an lsa crank that I am going to use and I figured I would need a new clutch anyway so not a big deal I guess... the zr1 crank is 9 bolt and also has a longer snout so it will need to be machined or use a spacer to make it work... due to the lightweight rotating assembly used in the zr1 expect to spend quite a bit to get it balanced if you use an aftermarket steel rod/forged piston, for that reason it may not be worth it in my opinion
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Old Jun 30, 2019 | 11:12 AM
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I'm looking at aftermarket forged units. Some readily have either pattern, reluctor, long or short nose and wet or dry sump setups, as well as 6 or 8 bolt pattern. I figure if there is a benefit to 8 I would do it, but if not then there is no need for the expense.

In my head, at a pretty steadily predicted 700rw, I am trying to decide between keeping my LS6 crank in an LS2 block or stepping up to either a Dart Chinese billet ccw (machine work needed to block) or all the way to the callies Magnum ccw. These impact the budget greatly.
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