According to one of Fords websites :
For a 1989 Ford F-150 , 5.0 liter / 302 cubic inch V8 engine :
The spark plugs are gapped at ( .054 inch )
0.028"
the 50 mark
NGK plug BP4HS - Gap for PW 50 is 0.6mm.
autolite platinums, the gap is .50
.50
The plug gap for a 94 model, 50 hp Johnson is .030-.035 in.
There is no gap. The right plug is flat, with electrode in the center of a ceramic circle.
The spark plug gap on a 2003 Chrysler PT Cruiser with turbo is between .40 and .50. The difference is in the type of plug used.
between 50 and 57
NGK BR8HS with a .032" (0.8mm) gap
50
.50