Chrysler Impellers

Last night at church I was talking with Billy and Mark. Billy said that it is usually good to replace the impeller every couple of years. Billy thought it might be kind of hard to find one for my old motor. I found this web site with some Chrysler impellers but don't know if any of these would work.

http://www.go2marine.com/category.do?no=17165

This is the picture of the kit.