According to one of Fords websites :
For a 1967 Ford Mustang 289 cubic inch ( 4.7 liter ) V8 engine :
( The spark plugs are gapped at .035 inch )
On a 1967 Ford Mustang : * If you have the 200 cubic inch inline six cylinder engine : The spark plugs are gapped at ( .032 to .036 inch )
fordparts.com shows the 1967 Ford Mustang 390 cubic inch ( 6.4 liter ) spark plug gap as ( .035 inch )
On my ( 1991 ) Ford Mustang 5.0 liter the spark plug gap was ( .054 inch ) What year of Ford Mustang ?
The ( 1968 ) Ford Mustang 200 cubic inch straight 6 cylinder spark plug gap is ( .035 inch ) I'm assuming the 1967 was the same ?
The 1966 Ford Mustang 200 cubic inch straight six spark plug gap is .032 to .036 inch
.054
The spark plug gap for a 1988 Ford Mustang is: .044" for the 2.3L 4-cylinder engine .054" for the 5.0L V8 engine
.054
According to motorcraft . com the spark plug gap for a 1993 Ford Mustang 5.0 L - V8 is : ( .054 inch )
( .050 inch ) - spark plug gap for 1986 Ford Mustang - 5.0 liter engine
.044 inch spark plug gap for the 2.3 L - 4 cylinder engine in a 1993 Ford Mustang
.050 inch spark plug gap - 1986 Ford Mustang 5.0 L ( 302 )