SpeedJunkee

I have AFR 227 heads in my LT1. So I need a gasketed plug. I was told at the time that Autolites where the only ones I could run. Is this true? I prefer NGK plugs, but if they won't work, they won't work. I know the Autolites do because I have ran them in the past.

I have found NGK's in a gasketed plug, but the gaskets look different (NGK has a different taper to them so it visibly seems).

I need a plug that will work for my heads in an 8 heat range.

I was planning on using an Autolite AR3934. Now, I have ran into issues in the past where Autolites heat reference tables have been straight up WRONG. Can't really afford to have a mistake, so I need verification that the Autolite AR3934 are indeed an 8 heat range.

Anyone have any info?

SpeedJunkee

Okay, due to the overwhelming amount of responses, I took it on myself and found that if the NGK plug is gasketed, that it will work for my heads.

Can anyone verify the heat range of the Autolite AR3934? Or does anyone know of a gasketed NGK plug in a 8 heat range?