I agree with the Champions and I'll go further... Forget all about platinum, iridium, unobtanium, etc. and stick to good old copper plugs. They may be effective with newer designs, but even with a HEI replacement ignition system, all the 258 needs is a copper plug. The others will cost more and do no better; save your money on this one!
I'd rather be lost on the trails than found at home!
Phoenix Rising- A Flame Off Restoration?
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