You may be on to something there, I measured one of the adjuster bolts in the '74 and came up with 3.5" overall length and did the same with my '73 Dart that's outside and the adjuster bolt on it comes out to 4" overall length.
Neither has been cut down, but the one in the '74 is half an inch shorter. I'm going to look around and see if I can find the bolts I removed from my '71 Demon when I tore the front end apart to see if they're 4" or 3.5"