Spanky,
the formula did change somewhat over the years due to the advances in bow construction...also Schulz refined that formula in the late 80's with his string follow bows...
Rob, one of the most critical, if not the most, elements of a proper Hill style bow is limb tiller/bend at full draw. Compare Hill's limb bend on his personal laminated bows with Schulz's personal bows and they are identical. This was very important to Schulz in bowmaking. I try for this same bend in my bows and Schulz has confirmed this to me. You are an interesting case....you very well might need a shorter bow than you have always thought in order to get that proper limb bend. But, as I've said, there are many factors in deciding how to build the bow to fit you...not just bowlength, not just grip profile, etc.