hello, I am looking for information on head gasket and water impeller for a 1954 6hp elgin. My first question  is can  I use a 1954 7hp gasket on a 1954 6hp. The gaskets are the same size,they have the same bolt holes.the water flow holes are a little different.  The water impeller is shot, are there any out there to find? Thank you for your time. Be safe. Thank you david