The one on the left is drilled and tabbed properly for the parking brake. The one with the big rubber piece on it is drilled for the defrost cable (quite a bit of difference in the mounting holes). I did nothing to the holes, they are original. I assume that smaller parking brake bracket will have a rubber piece mounted in front of it like the 53 has (very small rubber washer). My project for this purpose is 1950.
http://devestechnet.com/Images/ParkingBracketDefrostBracket.JPGCould it be that the rubber one is for the "Warmer" bracket? I can see that making more sense. Then I am missing the proper defrost cable bracket. The holes are not the same between parking brake and defrost on the dash.
