New owner of 1974 E27 with Volvo MD7A looking for tips on impeller change. I'm confident I can easily do all the mechanical things, but I can't see the pump. I can feel it, but that's it. My service book says the pump is on the aft end and I can feel the round shape and it has hoses and screws, so I'm assuming this is it. But..... All inputs appreciated. Jim