well as far as i know , barry g. ended up in litigation with holly, cause he took there carb and simply made it better, and resold it under his name, holly didn t like that, but they had no idea what was to come of this, because the judge sided with barry g. and saw that holly had no patent numbers on there parts , only on the carb it self, not on parts like power valves, jets, floats,etc, so barry g. won,and in turn im not certain but there was such a turn around that barry g . would have been able to counter with his own patents that holly was now using, so i dont know the whole case , but the simple things , like a billit aluminum base,no warpage, nice allen screws for the float bowls , in place of the crappy phillips head screws that always stripped out , ya know holly's were a pain in the butt , and barry g. fixed them, it even comes with a video to help install and tune! they are nice carbs and easy for me to work on but thats is the story