69 Charger 440 with power drum brakes. Suspect booster issue so picked up Cardone 54-73501 rebuild to help with troubleshooting. Here's the picture everyone uses for the 54-73501 (ebay, summit, rockauto, etc). It does structurally resemble the original Midland unit.
Not even close to what shows up in the box:
Haven't checked exact dimensions, but they look close in terms of fastener spacing/location. Differences are pretty obvious, crimped halves instead of the bolted v clamp, orientation of the vacuum port, and a roughly oval front indentation vice the square. This last one is impt because the hub/filter insert (shown in top pic) mates with a rubber seal extension on the shell. Can't do this with the "new" version. Not sure what effect this has on functionality.
There's also the question about air gap, as was noted in another post in response to a troubleshooting question. That is, was the booster rod threaded screw "set" by the rebuilder based on using (or not using) the orig hub/filter insert.
Emailed a similar note to Cardone tech support but, in the meantime, was hoping some brake gurus would chime in. Anyone dealt with this "new" version of the Cardone 54-73501?