Look for a flat pad at the front of the passenger side cylinder head (straight down behind the alternator). It should have a number on it. You may want to remove the alternator to get a good look, but you should be able to see it even if you don't remove it. Post this number and I should be able to tell you the size of the engine and possibly the year, horsepower rating, and what models it was used in. If you take off one of the valve covers and post the casting number of the head, I should be able to tell you some info on them as well.
