.044 inch ( .054 inch if HIGH ALTITUDE CALIBRATION )
for what size of engine ?
Which engine?
8
.052 - .054
That would depend on which engine size you have
( .054 inch ) according to www.motorcraft.com
passenger side of engine , front cylinder
on top of the spark plugs in the intake manifold.
you need an alternator
4000# give or take depending on engine size
www.motorcraft.com shows (.044 inch ) plug gap on the 1989 F150 300 cubic inch ( 4.9 L ) straight 6 cylinder engine
1987 Ford Truck F150 1/2 ton P/U 2WD 4.9L FI 6cylThe Spark Plug Gap.044 (In thousandths of an inch)