Theres an auto zone and o'reilly is somewhere in the twin cities im sure. I dont think auto zone would be likely to carry the one I need. Ill call them up though, cant hurt.
Check their websites. I use www.autozone.com and what used to be www.kragen.com all the time. (Now www.kragen.com, the Checker/Shuck's/Kragen group, is gone as it was bought buy O'Reilly.) I'm not as familiar with the O'Reilly website but it seems to work similarly. You can actually check stock and then call the store to verify.
I wouldnt really rely on what it says for a 1984 Olds. Its showing only working on Cadillac up to 1980. On both rock auto and oreillys web sites. If you got the money though you could try both. It may work. It looks to be the same as the one Oreillys actually lists for your specific year and model. Just from quick glance http://www.oreillyauto.com/site/c/se...lle&vi=1027639 you can see and compare it yourself and make a better decision whether to go that route or not. You might be able to save yourself about $50 if you can make the rock auto one you linked to work.
The alternator on yours would likely be a 105 amp. Have you looked at the housing behind the ear where the tensioner/adjusting bracket bolts on?? Thats usually wgere the number and amp capacity are stamped in. A 63 amp may not handle all the "stuff" that Caddys have loaded on the alternator.