To gap the points on 390 cubic inch Ford engine a gapping tool is needed. The tools allows a mechanic to physically stretch or reduce the gap. The recommended gap is 10 to 14 millimeters with the ideal of 12 millimeters.
.019 new points. .017 used points.
.017
fordparts.com shows the 1967 Ford Mustang 390 cubic inch ( 6.4 liter ) spark plug gap as ( .035 inch )
.035 inch spark plug gap for a 390 V8 in a 1973 Ford truck ( according to www . motorcraft . com - no spaces )
I believe that's .017 point gap with the automatic transmission equipped 390
.044 inch
should be between .017" and .021"
.025
Point gap---.017 Plug gap----.034 Dwell Angle-26-31 Timing------10-12 BTDC
18
The 1989 Ford Escort is computer controlled and therefore has no points or gap.
Point gap---.017-.019 Plug gap----.034 Dwell Angle-26-31 Timing------10-12 BTDC