65RivGarett Posted January 20, 2023 Share Posted January 20, 2023 I have a 65 Riviera was going to put lowering springs on it wanted to confirm it was a 401 after researching vin # , engine stamp etc. Am now even more confused from the information I have gathered I have a #s matching 425 in a non gs. Is this even possible , no dual carb guessing manifold was changed out Link to comment Share on other sites More sharing options...
rocketraider Posted January 20, 2023 Share Posted January 20, 2023 https://forums.aaca.org/forum/73-buick-riviera/ 1 Link to comment Share on other sites More sharing options...
1942aerosedan Posted January 22, 2023 Share Posted January 22, 2023 I think I'd be more concerned with the riveted vin plate Link to comment Share on other sites More sharing options...
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