Q: Spark plug and gap? - S351 NA
 

changing plugs, and need to know what plug is best and what gap is best. currently i have used NGK 3951 and gapped them at .35. this did not work out so well car won't even run, i must have read the wrong thing when i bought these. any help appreciated.

thank you for showing me that thread. I'm assuming they gap of .028 and .030 they were mentioning is for a R model car with the blower? i have a naturally aspirated car and just want the best gap possible . is it okay to run a gap that low on my NA car? thank you kindly for all help, I'm just trying to get this 18,000 s351 tuned and up do date.

The emissions sticker under the hood of a 1995 S351 says to gap at .042"-.045" (the decal also gives firing order, etc)

Do you still have your decal?

I always run autolite 3924 set at .032 for a N/A car.