Not sure how much this helps, but, GM did a very aggressive common-ization program in that era -- Delorean bitches to high heaven about it in "Clear Day."
This included the '70 1/2-81 F-Body, which got '71-76 B-Body spindles and brakes. Hell for stout, but very heavy and expensive for what started out as a "compact" car. Even the last gen RWD Nova/Seville used these parts.
GM fans can thank the 14th floor for this... where the Ford and Mopar iron of the era disintegrated rather rapidly, the tank-like GM cars just kept chugging (as long as they didn't have the Diesel... but that's another story.)
Short track guys used the longer Seville upper and lower control arms to get a little better geometry (or so it was claimed) in categories that required stock production parts.
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