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3,164 Posts
Discussion Starter · #1 ·
Need so advise selecting some spark plugs.

Motor is a 12.5:1 466
Factory SCJ DOOE-R Heads (Ported)
MSD Ignition
1050 Dominator on Ford Racing Intake

What heat range is a good starting point? Plug #?

Factory Plugs for A Factory 429 SCJ are shown as Motorcraft AF22? I Don't believe these are avaliable anymore?

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