I started installing the system late last year (prior to the winter cold) but it has been on hold since then. With the exception of one bracket at the back, the compressor fits perfectly onto a 340 with an Air-gap intake. The compressor mounting is very rigid, so I don't think it will be a problem to leave the back support off.
However, there is a fitment issue with mounting the condenser on later Cudas. My installation is in a '72 Cuda, and there were some major interference issues when attempting to install the condenser/drier in front of the radiator. The drier is mounted to a bracket in front of the condenser, and there is a binary switch that sticks out the front from the drier. The location of the drier/binary switch interferes with the back side of the grille big-time, so it's obvious that Vintage never mocked up this setup into a '72-74 Cuda. I contacted them about this and they sent me an adapter to move the binary switch so it is in series with one of the lines intead of directly coming off the drier, but this is now presenting a problem with one of the hardlines being too long (the supplied adapter is in series with a hardline and adds ~2"). The result is having to bend the hardline to make it fit and it just doesn't look pretty (but should work). When I start back on the project I'm going to see if there is another location where I can add the binary switch adapter so it doesn't affect the hardlines, perhaps in series with one of the rubber flex lines).
With the weather starting to improve, I'm hoping to get going on this project again and I'll keep everyone posted on the progress...