340 spark plugs

[Juan Veldez]

What spark plugs would you recommend for a 340 w/ 10.5 pistons, mild hydraulic cam (low rpm, hi torque type), single 4 barrel on a dual plane intake, and Edelbrock aluminum rpm heads? No Nos, no turbo, street car. Thanks in advance!

 

[moparleo]

Welcome back. RJ12YC in my Challenger. Mopars are designed to use Champion spark plugs. Stay O.E..

 

[Juan Veldez]

Good to be back - thank you for the advice sir!

 

[Adam]

Champion RC12YC are also what Edelbrock recommends on their website.

 

[brasil]

Autolite 65

my 340 loves them.... but I have the IRON Big Valve Heads...

Greetings Juergen