I think that the squaling noise you are hearing is more likely the piolet bearing for the clutch shaft as the only time when it turns is when the clutch is depressed...Not sure about the clutch facing thickness.
Where Are You From? Leavenworth, WA / Yuma, AZ
Do You own a car built by Durant? '29 model 40 coupe, '23 A-22 touring, '25 Flint H-40