My cousin Justin has a Geo prism, but his is the 3 cylinder. Needless to say, I rag on him on multipule occasions. However, as for the Engine swap, forget about it. If memory serves me right, their a different bellhousing. If you want a HP boost, look into a turbo, a Overbore, or pull the whole drivetrain out, put it on a GM ladder body frame, Bolt a 350 in and use it as "The sleeper from hell" Otherwise, you cant do much ith it

Also, word of warning, the unibodys on those have a good tendancy to rot along the mid-rails