1970 Duster project in Sweden
They make pan gaskets out of neoprene rubber. Make sure the pan flange is good and flat at the screw holes. It doesnt take much to snug it up. I bought one that's a deep sump pan for a jeep with an A904 from a jeep offroad site complete with built in drain plug. Heavy gage powdercoated steel. Jeeps also use A727s as well. Comes with neoprene gasket, filter, longer screws and filter extender. I think I payed $50 for it. Price has gone up a bit. It's got a built in drain and is really thick gage steel. RT offroad for A904 or A999