ACDelco R45S conventional spark plugs for an original ignition system.
A/C delco
A/C Delco and put the # in it that it calls for from the factory.
The Chevy 327 was manufactured from 1962 to 1970. It was only available for eight years. The Chevy engine was considered one of the best of its time and was good if racing a car.
The original A/C Delco plugs are hard to beat. Just get the right heat range for your application.
What grade of oil is best in your 5.3 liter Chevy engine?"
Need to know the year of engine. They are all different. The brand should be AC Delco according to my father, Champion are for Fords!
I believe ngk r the best....
The spark plug gap for a Chevy Monte Carlo with a V6 3.8-liter engine is typically 0.060 inches (1.5 mm). However, it's always best to consult the owner's manual or a repair guide specific to the model year for the most accurate specifications, as gaps can vary slightly depending on the engine and spark plug type used. Proper gap adjustment is crucial for optimal engine performance and efficiency.
.040 for best results
It has been my experience that what the manufacturer used is the BEST choice. Your truck came with AC Delco and they will give you the best and longest performance.
The recommended spark plug gap for a 1973 Chevy Nova with a 350 cubic inch V8 engine and a 4-barrel carburetor is typically around 0.035 to 0.045 inches. However, it's always best to consult the owner's manual or a service manual specific to that model for the exact specifications, as gaps can vary based on engine modifications or specific applications.
you could find the spark plugs on each side of the engine behind the wheels....that is the best way to get to them, using a long extension and rachet...the hardest plug to get to is the #1 plug....that plug has to be removed from on top....