I have a setup of the following:
67 fastback (formerly an automatic),
deep pilot bushing, about 7/8",
bigblock toploader (RUG-AE2) with short snout large diameter input shaft,
custom clutch plate 10.5 in with large input,
custom clutch cover with long levers (I think, though this seems wrong, but I recall
the clutch maker saying this to me when we were discussing this build),
large throw-out bearing (obviously),
and a custom fork that I had made by taking a big block fork (galaxie , I think)
and having a length of material cut from its center section and the ends rewelded
to be the length of the stock 289 small block fork and also with its dog-leg subsequently
removed, so that it resembles the small block fork but with big block ends,
also I have the bigblock threaded half-ball to push the fork,
and that ball (on its threaded rod) is all actuated by the stock 67 4sp clutch pedal
/ equalizer setup.
My problem here is that something is not right.
I know this can work since a long lost buddy of mine had a 65 fastback with 289 and bigblock toploader and manual clutch.
I have two problems with this setup:
I have a vibration, which I am pretty sure is caused by the short snout since I
have seen (orbital) wear on the edges of a previous stock type (1/2") pilot
Getting a long snout large diameter input shaft from TopLoader heaven should fix
this. Or even using the small diameter long snout shaft with all the stock parts elsewhere.
But even if the vibration is not because of the short snout, the long snout (with the stock 1/2" pilot bushing ) is the correct part, right?
The cluch pedal has zero play at > 3000 rpm or so.
Meanning, when the centrifugal weights on the clutch-cover levers start to do their
thing and tighten the clutch, they force the throw-out bearing against the fork
and the fork forces all the play out of the pedal sytem.
This is not good.
So the big question is,
"Does anyone know the correct setup of parts, and customization, and lever ratios of the fork to make this setup work?"
Surely somebody out there has done this as well.