Lots of racers only use 3 quarts in their motors. That keeps the oil level off the crank for more HP. How that would work for the street, I don't know but if it can stand up to that stress, it would probably be fine on the street. I wouldn't worry about that too much as long as it's in the middle of the sight glass.
1980 LTD (changed over the years), 1979 LTD (being rebuilt), 1977 KZ turbo and various KZ's in various states of build. KLX110
