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JR Dean · 01-16-2013, 09:16 PM

I ran dual glasspacks when my '63 GMC still had the 305 V6 in it. I just put a 355 SBC in it and will be running larger pipes. The glasspacks are for 2" pipe. I still have a pair of Dynatones that were behind a flathead during the late '50's & early '60s. They had a great sound but are too small for anything in this age.

01-16-2013, 09:16 PM	#4
JR Dean Registered User Join Date: Jan 2013 Location: LaVale MD Posts: 17	Re: Glass packs I ran dual glasspacks when my '63 GMC still had the 305 V6 in it. I just put a 355 SBC in it and will be running larger pipes. The glasspacks are for 2" pipe. I still have a pair of Dynatones that were behind a flathead during the late '50's & early '60s. They had a great sound but are too small for anything in this age.