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sounds like my 3.4 only less lump idle(3.4 came from the factory with a more agressive cam) a little less rumble. But not bad at all really. throw in a set of 18lb injectors and she'll really pick up some low db.
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2000 Tahoe Z71 5.7
1982 Z28 Pacecar 305
1999 S10 
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