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Discussion Starter #1
I am rebuilding an '88 HO that I bought from a salvage yard, less the flywheel.

I thought all late post '80(?) 5.0's went to the 50 oz external balance. So I bought a flywheel from an '87 5.0 non HO (truck).

Now I am getting conflicting "advice" in that contemporary non-HO 5.0s retained the old 28 oz internal balance so my '87 flywheel will not work.

Thanks in advance for help!
 

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I think they all changed. The 351 stayed with the 28 oz balance. The back of the 50 oz. flywheel should have a large weight going about 1/3 the way around. The 28 oz is about half as big.
 
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