From what I can see it looks good. I do love looking at engines.
Probably not going to seek 700+ whp and run it at something well withing it's tolerances. 550whp say. Just for peace of mind as I don't want to be without the Z for so long like. This 12 months without it have been terrible.
600 and odd crank horsepower is plenty, I'm sure.
Honestly till now except highway straights i haven't been able to use mine 640 hp. On a country road trip I took yesterday i was reving car till 4500 rpm and i was flying around normal cars
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what is it you have ?