Colder plugs?
I'm taking a stab here, but shouldn't blower plugs be in the colder range and gapped close up(i.e. .030"-ish)? I don't have one yet, so that's just from reading. I'm interested in replies.
Also, what is managing your boost timing retard?
You might benefit from a BTR module.
Again, just a stab. Good luck and those numbers are still pretty good.
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1988 GT Convertible
331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta...
One week with new motor, two speeding tickets...joy
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