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Re: Iridium spark plugs anyone use
While they're not iridium I am running ACDelco RapidFire platinum plugs in my '74 350 and haven't had an issue with them at all. The engine is rebuilt and doesn't have 5000 miles on it yet but no fouling or misfires at all with them.
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'51 South Bend Model "9A"
'56 Chevy 3600 NAPCO
'74 Chevy Cheyenne Super K20-restored on 37's
'72 GMC Sierra Custom K2500- in progress
'08 GMC Envoy Denali
'12 GMC Sierra 2500HD Denali
'17 GMC Yukon XL
VCCA member #58596
http://www.nohrco.com
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