Just a quick butt-in for this one-
On CTW a couple weeks ago, there was an article about getting more mileage/power out of your TBI. The company from which they ordered the test kit for the TBI pickup said they've had the best reults with stock AC Declo plugs. Said they get the most responsive and reliable spark out of them 
Maybe stockers are just fine?
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Dolan
00 Chevy 3500 Crew Cab LS, 7.4 ltr 4:10 rear. 70 series Flowmaster Exhaust, K&N FIPK, JET Chip, Drop in liner, Capitol Radial 265/75's
91 S Series Blazer, 4.3 liter 4WD Auto. Minor Engine mods, Spin Tech Exhaust
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