Man, pop those washers off and see if it won't shift.. Looks like it will. You may just need to get some grinder action going on those washers and make the like a cam
The washer isn't limiting the side to side movement. The slot is only marginally larger than the bolt and is radiused at the bottom so the weight of the motor is going to center the bolt on that radius provided both mounts are located correctly. And there isn't much slop in the slot anyways. So popping the washer off alone isn't going to get me anywhere.
And based on the input here I am starting to thing I don't want it any further to the PS. I plan to see how the VC bolts come out but my gut says if I move the motor over 1/8", I won't be removing the VC's without at least jacking the motor up.