Vortec heads - best spark plug?
01-09-2010, 06:45 PM
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St. Jude Donor '06-'07
Vortec heads - best spark plug?
Is there a preferred plug for these heads? I'm running an MSD 6A as well. Right now I've got a few sets of plugs to choose from that I have on-hand, from Bosch Platinum to R44's to R45's, etc. Is there any real difference between these heads and the "regular" cast iron heads I've been running? Thanks 
