I agree with JP and for once he is right.
Fix the swing. At 80 mph all you need to do is make sure the trailing hand releases over at impact. Don't try to guide the head or you tense up and prevent the head from spquaring at impact. Try teeing it up trying not to let the back elbow get too far away from your side and keep the wrists loose as a goose and just swing through to the target and don't worry about the ball as I'm sure it will get in the way of the head coming through. You can't hardly even add enough tape to change the characteristics that much anyway. Remember also to keep your head behind the ball at impact. Sliding just a little forward of it at impact leaves the face open and either leaves a push or a slice dpending on the swing path.