Ken---Taking the play out of the pedal box is important for the clutch
to get full movement of fluid from the Master Cylinder, as you know.
Having this "box" out of the car makes it easier to repair the operating
arm, from the ovalling after long use.
There are at least a couple ways to repair this. One would be to fill
the original hole with weld, then bore it out to fit the clevis pin,
about .313. Try to get a fix as to where the original bore was, before
filling it up.
You can also bore it out to 7/16" and get a bushing with a 7/16"OD X
5/16"ID. Cut the length to fit the thickness of the operating pedal
shaft. A new clevis will snug up the two. Ten years from now when this
one wears, all you'll have to do is push in a new bushing!
The push rod that then operates the MC can also be threaded to make it
adjustable. There is a limit to how much you can lengthen the stroke
without bottoming out the piston parts. To find this new length it is
necessary operate the MC to where it is not pushing against clutch
resistance, so you'll feel it bottom. You can expect to make it about
.150 longer than the stock rod. Once you have all the play out of the
pedal box, this extra measure isn't usually necessary to get all the
stroke you need to disengage the clutch.
For some reason, new push rods are only now available when purchasing
the whole MC. Fixing one that's also worn across the clevis pin area
should be repaired, or replaced if necessary. Take this into account, if
you make a longer rod.
There is no advantage in using an adustable rod for the Slave. Once you
get the .5 from the MC, that's all you'll need to disengage the clutch,
unless there's something out of sorts inside the bell housing, which is
another matter.
Seems to me that the ring gear bumps right up against the shoulder of
the flywheel, or as close as the machining here will allow. I can't see
where this would be critical, so long as it's fairly even all around.
Perhaps someone who has replaced their ring gear can be more specific.
Same goes for aftermarket starters.
Dick
'73
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