Not "A" body, but I respect many of the trans "experts" on here. Purchesed a 1988 D150, 2 wheel drive, to use as a tow vehicle for my race car. Truck has a 360 4bbl, 727 trans. I'm thinking of installing either a A500 or 518 to improve fuel mileage. My old Toyota PU, would get 18-19 MPG towing...