It depends. If you mean by creating a list of installed entities using MobileTerminal, then manually deleting the incompatible tweaks from the text file prior to reinstating the list of packages, then yes. There are no ways of restoring using custom IPSW with iOS 7 blobs. None of the known utilities actually have it working at a 100% rate. You can save your blobs, but more than likely they won't be of any use, even if you're on the last remaining pre-A5 device (iPhone 4)