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V · 11-13-2006, 04:22 PM

In 97-00 LS1 engine blocks, there is a "mounting boss" inside the valley. The LS1 PCV systems draws air from the valve covers so that doesnt matter, however the LS6 PCV system draws the air from the valley instead and the ls6 valley cover has an integrated baffle type thing that fill up quite a bit of the valley. To make the ls6 valley cover fit a 97-00 block, you need to use a dremel or similar and actually cut a small piece off the block itself, risking getting debris into the engine, something i dont think is worth it. On the 01+ "168" blocks, there is no little peice that needs trimming and the ls6 valley cover is a direct bolt on swap.

11-13-2006, 04:22 PM	#12
V Stalker Join Date: Aug 2004 Posts: 12,082 iTrader: (12)	In 97-00 LS1 engine blocks, there is a "mounting boss" inside the valley. The LS1 PCV systems draws air from the valve covers so that doesnt matter, however the LS6 PCV system draws the air from the valley instead and the ls6 valley cover has an integrated baffle type thing that fill up quite a bit of the valley. To make the ls6 valley cover fit a 97-00 block, you need to use a dremel or similar and actually cut a small piece off the block itself, risking getting debris into the engine, something i dont think is worth it. On the 01+ "168" blocks, there is no little peice that needs trimming and the ls6 valley cover is a direct bolt on swap. Last edited by V; 11-13-2006 at 04:24 PM.