The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 427 or 454: how can you spot the difference?

80SPORT · 03-10-2010, 10:53 AM

Often the 427 will be a medium duty high deck motor with the 4 ring pistons as these are cheap and available from buses and dump trucks...you can id these with the extra half inch of height above the water pump pads that the cylinder heads are ....also the intake manifold is wider ...

03-10-2010, 10:53 AM	#6
80SPORT Registered User Join Date: Mar 2008 Location: red deer alberta Posts: 777	Re: 427 or 454: how can you spot the difference? Often the 427 will be a medium duty high deck motor with the 4 ring pistons as these are cheap and available from buses and dump trucks...you can id these with the extra half inch of height above the water pump pads that the cylinder heads are ....also the intake manifold is wider ...