Re: flywheel housing shims? late production diamond block.
On the production line the shims were fitted to compensate for the housing gasket thickness I doubt they were dialled in they relied on uniformity of manufacture . I have changed out cracked housings over the years without dialling as I do not have the equiptment . I bolt the housing hard up with gasket and goo installed .I then fit the shims they are generally a tightish slip fit sometimes a gentle pry with a large screwdriver assists I know dialling in is the way to go preferably but in practise I get no chatter even with the old style "spoked" clutch disc .
John in sunny Suffolk County England .
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