.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
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 )
.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!!
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