Any design data available yet?

 

 

 

I'd venture to say there the same block.

 

from what i can see it looks like a more aggressive cam than the L92 but im pretty sure blcok/head/intake are all the same...dont quote me on that though

 

Supposedly different valves in the LS3 head

 

The press release stated hollow stems so I agree. They are L92 valve sizes and the stated staitc CR at 10.7:1 coincides with the 6.2 liter displacement and the L92 head chamber size with a stock gasket so I'm inclined to think that they are L92 heads too. The holden L76 manifold is likely also since it is a production peice with a current GM part number.