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Message: <blockquote data-quote="Addicted" data-source="post: 1464003" data-attributes="member: 24638">I ended up taking my NPI heads off due to the fact I'm going back with my original setup of my PI heads. I know<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /> make up your mind lol, but I want to port my NPI'S fully, weld the water passage on the rear passenger side head to accept the PI intake gasket so I wont worry of any leaks coming to light. There's been many successful PI intake swaps on NPI heads, but at this time, especially with me wanting a ported NPI head its best to use the PI's at this time. The NPI heads will eventually go on top of the Teksid when there fully modified for any type of camshaft. I wont give up on the NPI's<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />.  Anyway, I took the heads off and began cleaning the piston tops and gasket mating surfaces. Inside the block was a set of Speed Pro H591CP .50mm slugs that are 3.571" bore, +.020" bore, and as you can see from the pics, the cross hatches are still very visible after the 45 to 50K miles its been ran.  I'm very pleased to say the components and the overall manner in which this engine was remanufactured was top notch. Down the road I would be very happy to purchase another engine from ATK, thumbs up!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />[ATTACH=full]4569[/ATTACH] [ATTACH=full]4570[/ATTACH]</blockquote>