The 67 was measured with no accessories or load. It would be about 350 bhp today. It also had ledded fuel that would be like running on only e85 and with no cat today. If you had that the Z06 would be well over 1000 hp with the old rating.

I wish sites would stop using nm. The new chip should should be on tsmc 3n, that is a 5nm process. The old one was on 5n and that is a high density 6-7nm process