I actually was a student of Soon-Ho Chang in 1972. He originally was a very good and well respected Tang Soo Do (Moo Duk Kwan) and Yudo (Korean Judo) instructor. He ran a tough school with quite a few AAU regional and national champions. Tom Seaborne was his student. He actually lost his first school in Bethlehem PA due to the hard training and corporal punishment. Everyone quit except for several of us. He once said that he would teach out of his garage rather than compromise his values... They were the good old days. No Ninja-Fu then!
He then had two other schools in King of Prussia and Allentown PA. The corporal punishment went away, and classes were a bit easier. But in the early 1980's you could tell he was loosing his enthusiasm. He once lamented that the tough training would be respected in Korea, but in the USA you cannot make money. How inferior instructors were getting wealthy but good instructors were not. He sold his school in Allentown around 1984.
I'm not sure when he opened his school in Bridgeport PA, but I do remember him starting "Ninja-Fu". A true dissappointment. I once asked him about this, and the response was along the lines of... everyone needs a different gig to be successful... this is America, this is what people want... It was business. (sigh)
So I cannot comment too much on Ninja-Fu or his stated ranks. But at one time he was a very good Tang Soo Do and Yudo Master.
Mike