Get a 2 inch hose in proper length and shape. Cut off approximately 2 inches of 1 3/4 hose and install. Now install the 2 inch hose.You will have short section of double hose. Use two clamps if you are uncomfortable with the double hose. I have never had a problem from this procedure, started using it when installing 51 flathead in 48 model car. Currently using this on a 390 engine and aluminum radiator.