Correct sparkplug is Champion RN14YC
Here are the engines that came in the 1969 Plymouth roadrunner,so the spark plug gap is the same for all. I sure would like to see it.1969 Plymouth Roadrunner 6.3L 4BL HP 8cylThe Spark Plug Gap.035 (In thousandths of an inch)1969 Plymouth Roadrunner 7.0L 4BL 2 Carb 8cylThe Spark Plug Gap.035 (In thousandths of an inch)1969 Plymouth Roadrunner 7.2L 4BL 8cylThe Spark Plug Gap.035 (In thousandths of an inch)
.035
The suggested spark plug gap for a 1973 Harley Davidson is 0.040. It is the suggested gap for most of the spark plugs of that era.
on a toyota corolla 1995 with a 1.6 or 1.8 liter the spark wire layout is 1342
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( .035 inch ) spark plug gap for a 1973 Dodge 318 V8 engine , according to my Chilton book
.035 inch spark plug gap for a 390 V8 in a 1973 Ford truck ( according to www . motorcraft . com - no spaces )
.044
.035 inch
Yes, follow the wires from the spark box and you will find out where the spark plugs are.
18436572
.035 inch