One trick is to use the Mass Merge Recordings script. Make a release with totally new track list, then after adding it line it up with the CD edition and merge your new one into the current one.
As it is 8 CDs it will take a bit of messing around with to get it all to load up, and then the seven day wait for it to merge, but can be a big time saver that way.
Otherwise you’ll need to manually select 75 recordings…