I've got a set of the transmission crossmember bushings from spinningwheels-SC and I'm trying to figure out how to install them properly. First off, they come with metal shim inserts. Does this mean I should replace the bolts I took out that have the shims built in? The other important part is determining what direction I should put the two bushings & washer on either side. A simpel description or picture would be of great help.