if youre talking about the 2.5 litre there are a bunch out there. early x-body gm cars. citationm, phoenix etc if its a 2.8 litre, there are 2 versions. a standard 2.8 and a 60degree version. they are similar motors but one is physically narrower to fit into certain vehicles, mostly front wheel drive. google a pontiac or fiero hi-perf site, and you should be good to GO!