Here's a dumb question but it's important to me. I have a 1967 Johnson 20 hp tiller outboard. I need a 10 hp cowl for it. Does the cowl from a 1960 Johnson 10 hp fit this motor? They appear identical. I can't find info on this anywhere. There must be a ratty old 1960 10 hp cowl sitting somewhere on a motor that is no longer useful. Any suggestions or ideas? Thanks.