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gmc684x4 · 11-28-2020, 02:24 PM

Warren is correct almost all 10 blocks are 350 ci

To inspect further you will need to pull the oil pan and see what crank number you have to fully id weather 350 or truck 327

Its a large journal block

11-28-2020, 02:24 PM	#7
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: Need help decoding block Warren is correct almost all 10 blocks are 350 ci To inspect further you will need to pull the oil pan and see what crank number you have to fully id weather 350 or truck 327 Its a large journal block