im with fbody! ive done the same for alot of people around here. they were behind v-6's and they still got smoked! i would go for the higher hp applications gm had if your not going to rebuild it. otherwise i would go with a new one. if you dont connect the lock-up on the 200r you'll regret it seriously! it wil;l go bad in a hurry! id go with a th350 with 400 guts. you'll get the stouter clutches and gears in doing this. as the others have said it a direct fit.