Amazingly, the over-rev light did not come on!
There's a small (maybe 1/8th of a mile long) but steep hill near where I live that has been my "top speed test" area and this is the first day that I have actually been able to keep it held wide open till the bottom. Usually traffic stops me but not today. So at the bottom of the hill the speedometer registered 70 mph! This is with the air box mods, plus 1 size rear tire, and 12.5 gram roller weights. I was in a full tuck too.