The spark plug gap for a 1991 Chevy Silverado 2500 V8-350 is .035, according to major spark plug manufacturers (i.e. Autolite, Bosch, Denso, NGK).
.045
spark plug gap is .045 unless specified different by spark plug manufaturer.
The spark plug wires connect in the 7,3,5,1, 8, 6, 4, 2 order on the 350 motor for the Chevrolet Silverado made in 1990. This changes in the models built after 1990.
The proper plug gap is .035" or thirty five thousandths.
1-8-4-3-6-5-7-2
The 1986 Chevrolet 350 cubic inch engine spark plug gap is .027. Most spark plugs will be pre-gapped by the spark plug manufacturer.
AnswerThe spark plug gap is .035 on a 1993 GMC 350 TBI.
A/C spark plug is---R44T and the gap is 0.035
thirty five thousandths.i believe but you can always call a parts store and ask them.
.035 if u have a high voltage preformance coil 45,000 volts or more gap at 0.40
The spark plug gap for an AR135 spark plug on a 350 SBC should be set at .034 inches. This is equal to .86 mm so a spark plug set to .9 mm should work correctly.