Does anyone have recommendations for a good all round spark plug for the 340 LA engines ? I have had decent experience with Autolite # 65 but wonder if anything out there offer better serviceability with todays variances in fuel quality

Thanks

 

i just use autolite, a few ppl here say chumpion are real good in mopars,

 

NGK

 

I have had pretty good experience with both champion (in a stock motor) and NGK V-Groove in a mild build (.030 over with 1.88/2.02 valves).

 

i use champion

 

Everyone has their own preference. A good rule of thumb (which some may not agree with) any brand/part offer by Pep Boys or AutoZone, It’s going to be cheap or lack luster. (Please no flames, but honesty both stores carry bottom end crap for the most part).

Personally I’ve had bad experience with Auto light products, which is offered in both stores of course. I’ve always used AC Delco plugs, never once had a problem with them and its nice quality ceramic, some of the Auto lights I’ve worked with can break under very minimal pressure, even with a plug socket with soft rubber taking them out straight, even and gently

 

i use autolight or ac delco, depends on the price at the time =p