trying some NGK BCPR6ES plugs

[jerry]

mopar performance alumn heads. what gap do i set them at? 69 six bbl car.

[metallicareload99]

What ignition?  I figure you can't go wrong with 0.035"

[70sixpkrt]

Stock ignition- .035
MSD- .045

[flyinlow]

.045 " with Eddy heads and MSD ignition has worked well for me.

[jerry]

i run a 68 hemi super stock tach drive distributor .been running it for32 yrs.4.10 dana, hemi 4 sp with 4th gear overdrive.

[Nacho-RT74]

I installed those trying to hunt the pinging on my engine ( didn't get success with that ) after use XR4 and try XR5... didn't notice any difference really. Sure with iron heads and  10.2:1 CR

[flyinlow]

I was not trying to sell you on MSD (mysterious spark disappearance)  However when they are working the capacity discharge ignition can ionize a wider gap .

[Nacho-RT74]

I was not trying to sell you on MSD (mysterious spark disappearance)

never have heard of that before! I like it!!!