I would actually think the transmissions would be different between the V8 and L6 cars. I say this because the manual transmission bellhousings are definitely different.
Also hate to be the bearer of other bad news but the original air cleaner you are looking for on your Sprint is going to be a long quest unless you get real lucky. I've seen people look for years with no results. I would recommend a cheap chrome aftermarket air cleaner until you come across an original.