Yes , he should port the crap out of those stock heads , the stock exhaust port is so small it hurts , it would even hurt a 2.3 l. In fact a 2.9 l v6 has bigger exhaust ports. However , porting with a dremel tool is like changing yours wheels with a 3/8" ratchet . He should read up on porting before going at it, you can make a huge mess if you dont understand what to do and why, albeit he wont make a big mess in any kind of hurry with a dremel.
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