The minor difference in the height of the motor mount locking nuts to properly align your shaft will have virtually no measurable effect on the weight distribution. A 2" difference in the height of the supports from side to side only moves the CG about 4/100's of an inch toward the low side. A 3" difference for forward to aft only moves the CG about 6/100's of an inch to the low side. You body weight on the cockpit seats has far more effect.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."