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**AussieinNC** · 11-19-2021, 07:13 PM

Before you buy new plugs, clean up the plug seat area in the head and post a pic of the plug hole....

Also post a pic of the front of the head showing the casting pattern...someone may have put taper seat heads on this good old boy....

140 average and a 4% variance which is pretty good for this good old boy

11-19-2021, 07:13 PM	#28
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,162	Re: 283 Cylinder Head Decision Before you buy new plugs, clean up the plug seat area in the head and post a pic of the plug hole.... Also post a pic of the front of the head showing the casting pattern...someone may have put taper seat heads on this good old boy.... 140 average and a 4% variance which is pretty good for this good old boy __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox Last edited by AussieinNC; 11-20-2021 at 04:43 PM.