.044 inch ( according to fordparts.com )
what are the factory timing specs for a 1977 chevy 454
A GM dealer's service center would know.
The spark plug gap for a 1977 Olds 403 is listed as .060 inches.
.044 inch
That would depend on what size engine you have
.044in here for now this is for all engines v6 and v8 for 1977 .You should buy a haynes manual they are great for all of your specs and it should only cost you about $20. the manual is great!!
According to one of Fords websites : For a 1977 Ford Bronco , 5.0 L / 302 cubic inch V8 engine : The spark plugs are gapped at ( .044 inch )
If it is not a Dodge Aspen or the Plymouth Volare the specs are, Spark plug gap .035, Timing with standard trans 6 degrees, with automatic trans 2 degrees, Idle speed hot in neutral or park 700. The Aspen and Volare have different specs. If it is a California vehicle the specs are also different.
Spark in the Dark was created in 1977.
Spark plug gap for a 1977 Corvette using ACDelco R45TS is .035
These has 4 different marks
The spark plug gap for your Mercedes is .032