[V8 Bob]

A simple solution for replacing the very obsolete Borg & Beck pressure on a '49-'53 Mercury flywheel is a common diaphragm that any good clutch re-builder should have. Finger height, straight or bent finger design depending on throw-out bearing size, and approx.engine horsepower are all that's needed, with NO flywheel re-drilling. Diaphragms are also available as direct replacements for many Long style pressure plates.

I'm running off the shelf diaphragms on my flathead and FE Ford engines from our local rebuilder, South Bend Clutch.



The aftermarket, like Centerforce, is also a good source.


Borg & Beck and Long pressure plates have been out of general passenger car/truck use production for many many years, and for several good reasons; simpler construction, lower pedal efforts and lower costs of diaphragms.