I bought a 63 Riviera and would like to know which engine it has in it? the 401 or 425. It has a 4 barrel carb. and only the Wildcat decal on the air cleaner.
Welcome to the board!:TU: Does the decal say 445 or 465? A friend of mine just picked up a 66 425 nailhead - had the 465 on the decal. I would post any other nailhead questions in the 'Nailhead' section, just below the small block section. BTW, if you click on the 'user cp' button in the upper right hand corner, you can add (at least) your first name to the bottom of your posts for your signature. We like to keep the board on a friendly, first name basis! Thanks!
Look at the front of the motor just in front of the valley cover. There should be some letters stamped. Mine says MT which means it's a 401. The 425 should have an MW or an MZ - I think. http://www.buicks.net/shop/engine_ident.html Bill S.
