Fastand fury
Member
I have a 64 Sport Fury, 383 block but is now a 496 stroker! I'm running a Edelbrock Performer, a 770 Holley and electronic ignition. Trying to find the best spark plug to use.
I`ve got 5`s in my 440/505 , been thinking about going to 4`s , what size engine are you running them in ??NGK '4' heat range if alum heads, '5' if cast iron.
Stock heads with a mild hydraulic camWhat heads?
That is going to limit choices with the short reach gasket style plug.Stock heads with a mild hydraulic cam
I use 4s in my all iron 455 Pontiac engine & also use 4
who/where are you buying these plugs from , O`reilies wants shipping of $9 with theirsI use 4s in my all iron 455 Pontiac engine & also use 4s in a 487 Ponty stroker that has alum heads. I think next after using carbs that are too big....comes using plugs that are too cold.