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Re: 1977 GMC CCDW build
Dynomax Ultraflows or Hooker Aerochamber mufflers.
Buy the biggest case you can get, it'll be "quiet" at cruise and let people know you're in town when you wood the pedal.
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1999 GMC Suburban K2500 SLT, 454/4L80E
1991 Z/28, 6.0L/T56
1949 GMC 250, S10 Frame, 6.0L/4L80E
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