Robert,
Interesting subject on wing loadings. The Reynolds Factor comes into play. ( I am by no means an expert on it) The larger the airframe the more wing loading per sq. ft. it can carry. My WACO at a 35oz wing loading will not behave the same as your Pitts at 31oz. My WACO has 3996sq in. of wing area. Any small sport model would be a brick at 35oz wing loading. Most .60 size sport models have a wing loading between 20-25oz.
With that being said I still believe you will be fine. I know of WACO's flying at 40oz wing loading and fly fine. Would be interesting to hear from other Pitts guys.
Later!!
Anthony