It depends on a lot of things (line rate, line stoppages due to breakdowns or strikes, etc) but off the top of my head I'd say that one month is entirely appropriate.
I'll be interested to see if any of the guys have more specific data from observed builds for that timeframe and assembly plant.
K
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'63 LeMans Convertible
'63 Grand Prix
'65 GTO - original, unrestored, Dad was original owner, 5000 mile Royal Pontiac factory racer
'74 Chevelle - original owner, 9.56 @ 139 mph best
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