.035 inch spark plug gap for a 390 V8 in a 1973 Ford truck ( according to www . motorcraft . com - no spaces )
( .044 inch ) according to fordparts.com
.044
.035 inch
The spark plugs on a Ford Explorer are replaced by first disconnecting the battery. Remove the spark plug using a spark plug socket. Replace with the factory recommended spark plug.
the spark plug gap is .054in. for 2003 ford focus.
The suggested spark plug gap for a 1973 Harley Davidson is 0.040. It is the suggested gap for most of the spark plugs of that era.
My 2002 Ford Focus ZX3 has a spark plug gap of .050" (1.3mm).
According to one of Fords websites : For a 1973 Ford Bronco 5.0 L ( 302 cubic inch V8 engine ) ( The spark plugs are gapped at .035 inch )
The spark plug number that is in my 2003 Ford Ranger XLT is: AGSF34FP - Motorcraft.
( .035 inch ) spark plug gap for a 1973 Dodge 318 V8 engine , according to my Chilton book
A 1968 Ford Galaxie 500 with a 390 engine should use a spark plug such as an E3 brand spark plug. This plug should have a tapered seat with 18mm threads.