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Originally Posted by BigAls87Z28
The LS6 block was cast at a different plant in Mexico, while the LS1 was cast in Canada. Â*The LS6 block used high speed-casting, or something like that. Â*This actualy makes the block stronger to handle the higher output. Â*The LS6 intake was also used on ALL LS1's after 01, but not all LS1's got LS6 blocks. Â*By the end of 02, both the Canadian plant and Mexican plant use the high speed casting, so ALL LS1's after 03 are LS6 blocks with heads. Â*
All LS1's have different cams. Â*Vettes, Fbodies and GTO's, as well as Holdens all have different spec cams. Â*
As for the dyno numbers, thats quite awesome. Â*About spot on with a LS6, though I have seen Z06's put down a little bit more hp, usualy over 400hp, and that was with the IRS set up. Â*Id say take a look at the part numbers on the heads and see if this engine might have squeek past anyone at Ste.Therese.
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stock zo6's put down 345-365 to the wheels normally