Spark Plug Recomendation

[69Chrgr]

What spark plug recomendations do you guys have for a 408 SB w/Eddy Heads?
Thanks,
Darren

 

[340srule]

Autolite 3923's thats what i run in my 416..gap them @40...

 

[redfastback]

i run ngk plugs with msd ignition gapped @ .050. they also have to be 5/8 not 13/16.