We didn't shim ours, we tried to push it to the right in the mounts, but it kept centering....
Maybe try to put a 1/2" diameter washer or two on the bottom stud for the left engine mount...
Watch the clearance with the starter to the left header, it is very tight, even with mini starter there is an electrical connection with a rubber boot from the pipe that made us nervous, we somehow got it to have about 3/8" clearance, but it makes me nervous with the heat that can come off the header.