318 / 360 Difference

I am not new to the mopar hobby, but I am new to the world of A-Bodies. I recently bought a '73 Dart Sport with a 225 6cyl. I plan to swap the engine over to a small block. When I was looking at the conversion motor mounts, apparently there is a difference between the 318 mount and the 260 mounts. I haven't quite decided which engine I will go with, but what is externally different about the 318 a the 360? Thanks for the help.

Justin
"CornDog"
Author: admin