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I've NEVER had this happen in 30 years of building motors.

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i've never had one (bb mopar) that didn't require some attention here. always do the cam bearing one at a time so you can find the offending one(s). you can use a cam core or bearing scraper AKA razor blade to dress the tight spots

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Exactly...

It was my understanding that the bores on production blocks were all over the place and the factory actually had a fixture that final honed the bearings true. I build a lot of Chrysler big blocks and its very rare that I dont have some issues with cam fitment. Not a big deal to get it straightened out, but it always needs attention.

MB

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One out of four blocks will need work on the cam bearings, install them one at a time and then slide the cam in, fix as needed

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