Just FYI, that master cylinder is not rare, and it is not original to whatever early Barracuda you pulled it from. All pre-'67 Mopars, including all '64-'66 Barracudas, had single-chamber master cylinders. The '67-up dual-chamber masters bolt right onto the earlier cars, though, and the master cylinder shown in the auction appears to be a '67-'75 drum brake unit. Could have either of two piston retainer types, and any of three bore sizes (15/16", 1", or 1-1/32") depending on year and 9" or 10" drums. All variants are still available new. I'm not trying to diss your auction or anything, just bothers me when ordinary, common items are described as rare.
