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Did you run new plug wires 8mm or better?Are you sure the vacum can is working properly,I just went through this on mine(weak acceleration) and found the vacum can was going screwy on me.
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2001 Silverado K-1500
2005 FXDWG stage3
69 CHEVY Short/Step 327/4L60 373 posi
63 IMPALA 327/4L60
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