OT - 240Z Distributor Question

[Gary Boone <gboone@sisna.com>]

Any 240Z in-the-knows know what the mechanical (centrifugal) advance
should be for the 240Z distributor?  And also, is there a difference
between factory spec and what might make the engine run better (case in
point, for the roadsters, the smog distributor's advance of 35 crank
degrees for the late roadsters is bad, and converting to the non-smog 15
degrees is ideal)?
TIA,
Gary Boone

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