So that’s where it’s at now. ‘75 FW with a neutral balanced PP. It’s not a good match. I will talk to engine shop Monday that did the original balance with the ‘65 wheel. If you saw the photo I posted you’ll notice the 5 holes are 90-100* from the factory drill holes. Any attempts to zero balance the FW would require holes opposite if the factory ones. The driveline shop claims that there were some drill holes at the 90d position. Right. The lack of specs on the ‘75 FW other than it came off an F Body car (what else) raises doubt that it’s the same spec as the 65 FW. It could be an alternate design different from the typical 65-75 spec. Still waiting for someone to post the flywheel specs from the H-O publication.
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