Magnum spark plugs

[Robbie2734]

I'm looking for a plug number for a mild 10:1 360 with magnum heads. What do you guys recommend?

 

[TXDart]

I run NGK 4291 ZFR6F-11 on my magnum headed 9.75 to 1 motor.

 

[Robbie2734]

Thanks, hope to fire this up next week.

 

[3406pk]

For my 408 with magnum style heads and 10.5 cr, I use Champion 3344.