Spark plugs

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QTR MI

QTR MI

New Member
Joined
Feb 21, 2017
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Location
Crown Point,IN.
Have a 408 stroker .030 over Hughes hyd.roller cam 608/603 lift @254 duration aluminum heads ported/polished Harland Sharp 1.6 roller rocker assembly Holley Sniper EFI 10.5-11 to 1 compression. Suggestions on spark plugs to run? Thank you.
 
Been using Autolite AR3924's both in my 11.9 to 1 416 and my aluminum headed 360 for several years always performed very well,with my MSD I gap them at .045..
 
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