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Old 04-28-1999, 02:07 AM
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Just bought a 1974 450SLC (I think it is
the california model). It is missing the
emissions sticker. Does anyone know the
tune-up numbers. Specifically, timing,
dwell angle, spark plug gap and CO ?
Old 04-28-1999, 10:59 PM
Lee Scheeler
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Are you going to be required to get one for a car this old??

Old 04-29-1999, 01:59 AM
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Yes. 1973 is the cut-off year. But, I need the information for a tune up anyways.
Old 05-01-1999, 10:38 PM
Posts: n/a
Timing is 6 degrees ATDC with vacuum retard connected & working.
Dwell = 30 degrees
spark plug gap = .028-.032"
CO = 1.0-2.0 percent
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