'82-85 Cadillac 4.1 liter: any year better than others?

I am currently looking for a 79-85 Eldorado Biarritz and was wondering if any years of the 4.1 liter engine are any better than others?   I have had people tell me that the '84&'85s are better?  thoughts?
Thanks,
~Chuck

The '85 model year had some changes & updates to the engine.  That would be the better year.  You can tell by the ribbed(Dressy) valve covers on the 85 engine.