72 340 warranty block

Oldmanmopar just a question.. wasn't the -1 and through the span of that -4 and -5 the core shift? A realignment of the core to get it back to acceptable tolerances? If that's the case wouldn't the first batch of -2 be tighter than the last ones of the 1? Just trying to not over hype the stamped numbers. I'm learning and there's a lot to learn!
Dale