Reply With QuoteRedrill your 4 bolt flywheel or go search for the extremely hard to find 6 hole flywheel.
Well shoot! 6-Bolt vs 4-Bolt Crank/Flywheel
Looks like my lack of research is going to bite me. I bought a used running GMC to 70 engine to swap in my CCW. However the new engine has six bolt crank connection, and obviously my CCW original motor has a four bolt connection. Is there adapter that can be used? Am I host? Help!
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Last edited by USAFSS-ColdWarrior; 04-29-2018 at 21:59. Reason: Clarified Title for Future Searches
Redrill your 4 bolt flywheel or go search for the extremely hard to find 6 hole flywheel.
Is redrilling it safe? I have heard mixed things lolOriginally Posted by NDT
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Maybe weld up the old holes? We do it on subsea risers that have to withstand a lot more than a flywheel. Maybe redrill the crank?
Take your flywheel to a engine machine shop and have them do the conversion. This type of work is something done in the hot rod world all the time. Generally it's a four to eight bolt conversion, but a good machine shop should be able to convert four to six.
Why drill? Just get the correct parts. There should all be available. Also is it a flywheel or a flexplate?
It is a flywheel.
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I have no direct experience with the CCKW platform but I second the suggestions to redrill. A good machinist won't blink an eye at welding, heat treating, and redrilling something like that
It won't necessarily be cheap, unless you know one, so be prepared to ask around and speak to a few before finding one who will do it as part of the cause of keeping antique green iron in service. That guy won't gouge or complain about being a one-off job or so on.
Totally do-able, it's just moving metal.
Bulldogger
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Hey guys - can u use a flexplate in there instead of the flywheel being a Manuel transmission??
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