99 chevy suburban 4x4 5.7 I belive my transmission input shaft seal is leaking if I go thru all the work to replace the seal (pull trans and torque converter just to get to said seal I'm pretty sure) I might as well put a better converter in right? It's a daily just true dual straight pipes with cats on still. Throttle lip has been removed. Not looking to race anyone in a suburban but just to stomp and get the tires to chirp a little easier