Who has the fastest /6 here

Thinking....Tear down motor this winter and bump compression from 12.3 to 13.5.And try to lower my NA records,I do have over 350 passes on this motor with no issues so far.OR leave it alone and spray it with a 100 shot at Vegas next year and go for Nitrious records.Would go to 4,30 gears cause I am pushing the 4.56s to high now at the lighter weight.Thoughts and comments wanted.Guzzi Mark