The boost line doesn't run to the dash. It runs to a pressure sensor under the hood.
Removing the boost/tach module is easy once you get the dash out. Just cut a square of black construction paper or plastic to act a a light seal. That's what I did back when I pulled the module out for a Caspers rebuild.
If you have boost logging hooked up behind behind the glove box for the powerlogger, it will quit working with the module removed... unless you jump a 5V source as a backup.