Hi there, first post, I have gone 'head to head' with a Diablo, they are very fast in my books and at 160+ are very stable.
I don't drive a Skyline, I drive a Soarer TT (370hp), your engine and mine share the same 'design parent' (TMS) so we are 'closer' in some respects than any other car out there, despite no 4WD etc.
I'll post the 'account' tomorrow if no-one minds.
(I bought the Ceracaote from 'your Engineer' Gary a few weeks ago, good guy, good stuff)
Please don't flame me 'cos I don't drive a Skyline)