Jeff,
"one size smaller than original"
I do not understand - I guess I would have to see the screws/bolts. I have a box of many different original clutch head screws/bolts (collected from various trucks I have worked on and collected from boxes of clutch-head screws/bolts sent to me by other Stovebolters).
The clutch-head hardware had different "external" head-designs - all had the clutch-head center. However, there were two types of clutch-head center-shapes (I think Grigg posted information on this). All of these shapes/sizes are fitted by the 4 sizes of clutch head bits that I have.
