GN1 Aluminum Cylinder Head & autolite 105s

[vacuum 6]

Assuming the next hotter plug from 104 is 105, anyone running them in these heads?

 

[Ed Valvo]

Are you having fouling problems?

 

[vacuum 6]

Fouling problems no not really. I'm looking for a more complete burn. 103 were not hot enough so I changed to the 104s. The car liked it pickup 5 mph. Now I’m wondering if the 105 might work even better but maybe its too hot of a plug for the heads?