Alfetta/GTV6 propellor shaft length adjustment (fwd)

[richard bies <bies@domain.elided>]

Brian' right -- it ain't there on the Alfetta.  Amazing -- <one> thing is
simpler to do on the GTV6 than the Alfetta.

(It is possible that repeated, frequent failure of the rear donut on the
Alfetta caused this modification of what is essentially the same on the
GTV6.)

r.m.bies

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