Hello! I have a '71 Mav, 200 engine. The wheels are 4-lug, so I know the front brakes are 9-inch. I've not found anything definitive as to what the rear brakes are. I appreciate being told, but I'd also like to look at the resource such information is in. The Ford Shop Manual--as far as I've looked--leaves out that very important bit of information! Thank you!