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beamn7 · 01-26-2012, 09:31 PM

My grandfather's truck was a 79 GMC Sierra Grande 25 with a 400, 350 trans (believe it or not) and a 203 full time case and it was equipped with single exhaust. He bought the truck brand new off the lot in 79....

01-26-2012, 09:31 PM	#10
beamn7 Registered User Join Date: Oct 2011 Location: Wildomar, CA Posts: 466	Re: 400 exhaust My grandfather's truck was a 79 GMC Sierra Grande 25 with a 400, 350 trans (believe it or not) and a 203 full time case and it was equipped with single exhaust. He bought the truck brand new off the lot in 79....