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The places I called said they would drill out the old rivets and replace the friction surfaces. No one would touch changing the design of the disc itself. They said it would require hardware to act as a spacer and they wouldn't provide it or help design it.

I wonder... how much movement do you get of the actual friction surface if you remove it and reposition it on the opposite side? Consider that you also might be able to reverse the splined piece AND replace the rivets... the aggregate change might get you close enough to just mill the back of the bell. Measure up a storm on the disk -- that may be the cheapesy and easiest option.

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About starter shims. If you shim the starter, doesn't that just push the starter down? This is the type of starter that has two vertical bolts, no horizontal alignemnt adjustments that I see.

Whoops. I was think of starters that bolt to the front face of the bell, with the bolts parallel to the crank. 'Negative shims' are a bit of a joke (apparently a poor one!) -- think about it, wouldn't it be handy to be able to 'shim' a 31" door into a 30" door frame? <img src="/forums/images/graemlins/pfft.gif" alt="" /> Antimatter shims?

Randii