DADS50,

You are correct, 1947-48 mounts were different from 49-55st. Can you find an illustration for the earlier radiator mount?

http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0102.htm

Maybe someone will post links to photos (or, if you have already posted some, would you post the links again?).

The FAM is for 54/55st.

Thanks,