Depending on maker, it should have a number 1 raised letter on the cap
Goes to driver's side bank at very front-follow the wire
( .035 inch ) spark plug gap for a 1973 Dodge 318 V8 engine , according to my Chilton book
.035 in
.35 Gap
1-8-4-3-6-5-7-2
The marked # 1 position on the distributor cap faces to the FRONT / CENTER
The #1 plug wire is on the front left next to the intake bolt. The firing order (clockwise) is 18436572.
18436572
Dodge Spark Plug GapCall an auto parts store and they can tell you..040 inch
.040 inch
.035 inch
.035 inch