NGK vs. AC Delco spark plugs

[Mr. Chevy]

I think you will be fine. What I would do if you really want to be sure is put one in, disconnect the main coil wire so the car won't start and crank the engine over once. Pull the NGK plug out and check the electrode. If it does hit it shouldn't damage the piston like it would if you fired it up and ran it at a much greater rpm at idle..

I did this with my car just for my own peace of mind when I switched to the NGKs. They are great plugs and you will notice a world of difference..

Rich