.040 is factory...
The standard spark plug gap for the Dodge 360 from the 1970s was .0035. It was a common gap for most of the muscle engines of the day.
.035"
.035 inch
.035 or .040, depends on year.
.040 inch
.035 inch.035 inch
v8 318 360 FIRING ORDER 18436572
#1 is drivers front firing order is 18436572 distributor location is clockwise
pass side 2-4-6-8 driver 1-3-5-7
On a Dodge 360 engine, the number one spark plug is located on the driver's side of the engine, at the front. This engine is configured with a traditional V8 layout, so the cylinder numbering starts at the front on the driver's side and continues to the back, then continues on the passenger side. Therefore, the cylinder closest to the front left of the engine is designated as number one.
( 8 ) spark plugs for your 360 cubic inch V8 engine
The firing order for a 1978 318 and 360 is: 1843657 with the distributor rotating clockwise. Timing should be set around 4 degrees btdc (before top dead center).