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AC Delco or Autolite. SBCs DO NOT like Bosch plugs. the 3.8s love 'em but the 3.4s and SBCs(same plug) hate 'em. Now sense its been 2 years I would do a tune up, plugs, wires, fuel filter, injector cleaner (Lucas is the best), oil change while your in there. If that don't do it....Opti...
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2000 Tahoe Z71 5.7
1982 Z28 Pacecar 305
1999 S10 
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