Hi All. Just finished my 455" build and am curious what plugs are favored by all out there. Build: 1971 455"- .030 over, Icon 9-1 pistons, Eagle H Beam rods, Howard Roller Cam (int. .225/ Exh. .229) 560/555 lift@ .50)) , Howards 1.6 Roller Hyd. Lifters, Cloyes timing chain, Edelbrock Alum Heads by Bernard Mondello, Edelbrock Performer Intake, Quickfuel 880 cdm carb. No Dist. yet.
What plugs will perform best w/this build? many thanks in advance for any info.

 

i have the champion rc12yc plug in my aluminum headed 425, and so far is working well. It is actually a lawnmower listed plug!