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Re: Plugs for Vortec heads
I run the 605 Auto lite copper plug, as i was not impressed with AC 41-993 iridium price or performance
No issues with the autolite plugs
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Mike
72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider.
421 SBC / TH350 3000RPM Stall
Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks 
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