1979 460
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Joined: Dec 2003
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From: iowa
the crank spacer is right behind the harmonic damper, if it's external it will have a hatchet weight behind the damper that you should be able to at least feel. Also you can look at the block right above the starter, if it has D9TE it's a 79 or later model and should be external balanced.
As to the flywheel/flex plate question, no you can't use one from an early 70s model, it has to be for a 79 or later model engine.
As to the flywheel/flex plate question, no you can't use one from an early 70s model, it has to be for a 79 or later model engine.
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Freshman User
Joined: Aug 2006
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79 460
thanks for all the information. I was looking at the motor last night yea it does have a hatchet weight behind the harmonic balancer so it is externally balanced. I will look for that number marking above the starter and get back to you.
Posting Guru
Joined: Mar 2006
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From: fargo, nd
yep but youll probably need a 1/4 or 3/8" spacer plate between the bellhousing and the block because the flywheel is a little thicker and the clutch kit is a little thicker
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Elder User
Joined: Jul 1999
Posts: 877
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From: Missouri
I have done 4 swaps using the 400 bellhousing and have never used a spacer. If your buying a flywheel get one that has the bolt pattern for a diaphram style pressure plate.
If you use a spacer be carefull not to pull the pilot shaft back too far out of the pilot shaft bushing.
If you use a spacer be carefull not to pull the pilot shaft back too far out of the pilot shaft bushing.
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Freshman User
Joined: Aug 2006
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460 swap
I've done 1 460 swap before but that was on a 78 that had a 351M before and we didn't need a spacer. does the diaphragm clutch have a different style bolt pattern then the 3 finger clutch?
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