so i guess this is and old and short thread but heres what i did....
2000 obs with 2.2, i hydrolocked the motor being a retard so i decided to swap to a 2.5 n/a motor form a 2000 rs. All i did was swap intakes, drivers cam gear and, crank gear. it ran like crap for about 20 miles until the ecu learned how to run the motor 2 years later its running like a champ