man with gas prices i would stay stock. that type of FI u should have plenty of pwr and driveability with out any modifications just keep all the engine electrical devices intact and u will have a good set up for every day driving . as far as engine mods look for a 4v 302 or 4v 351w those r hard to find but if u find one thats the ticket as far as heads go 4v is 4barell and the windsor u have now is 2v thats 2 barell . when u go up to a 4v engine thats where performance comes in as far as stock . look for old police cars in the junk yard thats what we had to do to get a engine that had a 4v set up .