Re: Clutch question for Y-block Car guys
What you have is a diaphragm replacement for a Long PP. Normal diaphragms have an evenly-spaced bolt pattern, like the Borg & Beck. Ford didn't start using diaphragms until the '70s.
Your bent finger style release fingers are normally used with smaller od T/O bearings, while the straight finger design is for large T/O bearings, like 1 3/8" truck/older Ford/Merc inputs. It's possible the ends of the fingers were contacting the trans bearing retainer during disengagement.
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