I'll check things out. I agree, it seems unusual that only two would fail. I'll bet others aren't far behind. The springs are matched to the cam, the retainers and keepers are stock as are the rockers so I'm not sure how things could be off that far.
Here's a pic of the #2 intake.
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Ken
'68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac (
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'74 Ventura 350
'69 AMC Javelin SST