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**WIDESIDE72** · 10-27-2008, 11:27 AM

In original use, the engines did not have the "zoomie" headers. There were cast iron manifolds with mufflers. They were still pretty loud, though. I think GMC also made these to be used in tanks in the late 40's / early 50's as well.

10-27-2008, 11:27 AM	#12
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,494	Re: GMC 305 V-6 Big Block???? In original use, the engines did not have the "zoomie" headers. There were cast iron manifolds with mufflers. They were still pretty loud, though. I think GMC also made these to be used in tanks in the late 40's / early 50's as well.