Ok VN-VS SI are 165kw, VS SII is 168kw (different airbox and exhaust from memory). VN and VP blocks are exactly the same, and as mention then can be variances on the blocks from factory.
The end.
Yep I use this to calculate the Kw of a motor and work out the energy lost through the drive train. It has never failed me yet.
I can't imagine Holden redoing the cast for the blocks after so long in production. How would that be a cost effective change for the business? It sounds Chewbackered to me.