E3 spark plugs
#11
I find that ANY quality plug works fine in my 4.3s, longest lasting for me were the Bosch platinums that I found in the back of a Blazer I picked up for $500-got 50k in that motor then swapped them to a newer unit and got an additional 40k! Maybe the consistant use of Marvel in the gas helps;running Autolites now:45k and no issues!
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