I have heard that too, but do not know for sure. The dealer install kit would have been the standard bendix to back fit to 66 cars. Now the actual Brake MC in 67 was the same hemi unit with ports to the fender. 68 changed that for non hemi cars to Bendix MC with ports to engine. I do not know if that lead to a misperception on the actual bracket/booster. The booster was a bendix. But it may have been the standard one.