Dan, my thought is when the 427 was dropped in they replaced the tower clamp with the screw clamp as the tower clamps are very hard to use over again. They don't seem to have the same clamping power in retightning as the whole clamp streaches apart. My uneducatued guess is that Harrell used as many originl parts as possible within reason IE: the hose was retained and the clamp was changed because of function. Just a thought
Rich.