This is probably a ridiculous question, but I want to be sure before I attempt the install of this MPS. This is an eight rib MPS from zzp. I have a six rib belt...question number one-is the belt centered on the pulley or does it go more to the inner or outer? question two-after pulling the stock pulley and installing the MPS hub how do I know when I am at the proper mounting depth for the hub. Does it only go on so far, or how else do I know. Thanks for the help once again guys...