Re: 70 mustang clutch support bracket?
That spring provides a slight assist to your de-clutching effort. The
geometry is such that the spring is extended when the clutch pedal is
at rest and it unextends (relaxes) as the pedal nears the floorboard.
If you're running a diaphragm pressure plate you can easily do without
it. I have spent many 20 minute sessions at the SF Bay Bridge toll
plaza, inching toward the toll booth and having to slip the clutch
several times per minute, with no great fatigue. Even with a Borg &
Beck pressure plate you can probably do without it.