both sohc and dohc have good potential and are about same in reliability. it costs more to turbo the sohc but it has lower compression and therefore a better engine to turbo. there is a guy on ka-t.org putting down 240whp at only 6psi with the sohc. its slower NA though. also if u get a 91-93, chances are that it will have the gay 4 wheel steering crap.