I'm trying to chase down a high RPM miss on my blown 396LT4 which got getter when I regapped the (otherwise new) Autolite plugs down to .028

I'd like to try a different set of plugs before I start throwing optisparks at the problem...

Can anyone recommend a great plug, price not being a factor? I do want it 1-2 heat ranges colder than stock.

Remember, this is the AFR210 heads which have the washer, not the factory heads.

Many thanks!
- Dave

 

Try a autolite AR3910 its a colder race plug with cut back electrode...

 

I run NGK part# BKR6E-11 with my AFR 220's. Another good choice for ya...