engine motor mount plates

I'm changing to a sml block all ready changed k- frame found a HP LA-273 4brl engine, my ride is a 68 ply val 2dr post . engine has no motor mounts or plates connected to it, I have some from a old 318 engine plates but can't remember :banghead: if they bolt on the inside of the ears or the outside and if the right and left side are the same or different :cheers: need help thanks guys n gals