I need to rebuild my pump this winter. I have a stock Chevy 454 in a Spectra 19. I was at the delta this week and put around a 150 mi on the boat. It got me thinking, should I put an A or AA in the pump? What are the pros and cons. Will my stock motor have enough torque and Hp to turn the AA past let say 3500 rpm? how much fuel will i save or not save. Will the AA help pull a skier out of the water? I am using the boat as a ski boat, and never plan on putting any more Hp then the stock motor.