So we asked around and found a bit more, including from the NSW President of the APBA who believes that Henry's record of race wins makes him the Peter Brock of circuit racing.
Henry has won no less than fourteen Australian Championship titles in his career, and is the current six litre class record holder for the Sydney Bridge to Bridge powerboat race. Known Australia-wide for his driving abilities, as well as for his skill in rigging raceboats and his knowledge of Chevs, Henry is one of those people who will always lend a helping hand or find a part for you. Many a circuit racer has approached Henry for advice and guidance, and he is held in very high regard for his professional approach and the assistance he willingly provides.
Henry has often pioneered new trends or developments, including the use of a splined drive instead of a universal. He's also well known for keeping things simple as typified by his usual dash layout of just a tacho and oil pressure gauge. Henry reckons there isn't time in a race to look at more gauges than the two that matter most.