Exhaust

[torpedo]

I have a 1978 K-20 with a 454, it has true duals coming straight off the headers (one side has a muffler and the other one rusted off and I just haven't fixed it yet) that end a little in front of the rear axle. My brother and a friend's dad told me that 2 12" glasspacks would sound really nice, it's already pretty loud already and another friend said they'd probably actually make it quieter even though they're glasspacks. I was planning on just getting the 2 12" glasspacks but I was just wanting to see if anyone else knew if anything else would sound better