340 Performance Question

EL5DEMON340 said

well the stock 71 340 was closer to a true 310hp and most were not the true 10.3cr . That said with the better intake, bigger cam, 1.5 rockers?, and hopefully good machine work on the block and heads i would say 350 HP give or take 5 hp THAT'S WITH HEADERS!!

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Recently I have noticed for the first time there is mention/hint in some of the posts that the stock Mopar rocker ratio is less than 1.5, since when? Where have I been all these years? I began with a 1965 273 with solid lifters and the factory adjustable rocker arms (back in the 1970's), where they or were they not a 1.5 ratio? I never thought to check them back then! Thank you.