I have an 81 Automatic and have recently noticed an issue during acceleration from a stop. If I give it a good amount of gas it'll lose power, regain and lose power again. About 3 times before it is ok. So it bucks a little. If I slowly accelerate from a stop it's ok. If I am already moving, say 5mph, and accelerate hard it's ok. Once it's moving it runs great. Just when I hard accelerate from a stop. Any ideas? Thanks!