Getting ready to drop the new motor into my GS and while bolting on the motor mounts today I noticed two sets of holes in the block that the mounts could bolt to. Do I use the front two sets of holes or, the rear two? I believe the rear pair are right for the GS and, if so, what are the front pair of holes used for if anything. I'm stoked about getting my GS back on the road after almost 10 months. :beer