Diaphragm vs. Borg and Beck.............

Not to steal the thread, but I'm also in need of a clutch for my 69 340 Dart and can't decided between the B&B or the diaphragm type. I also do not want to mess with removing the overcenter spring. Not an easy job I have been told. What happens if you leave it in and go with the diaphragm type clutch?