I can't help you out here, but I'm planning on running these plugs when I get my engine put together. Also planning on gapping them .035 but I'm up for some debate on it.

 

.040 or .035

 

I use them stock gap. 7-15 psi. Not sure if it's best but works for me.

 

Guess i'm a little tighter then most at .026, but no ignition problems yet. I run 7's and a single 8 plug in number seven cylinder. Also on E85 though, might have some effect.

 

yeah the imfamous number 7 cylinder..... it seems to be working out well for ya foose, i might consider that idea.... My tuner just wants me to run a .040 gap for breakin then when we start adding some timing to it ill go to .035