no , i dont believe you would be comfortable my boy friend is 6.3. and he
fits in the car ok but at 6"6" i dont think you would feel all that great
any way when my friend gets out of the car people stare at him as if they
say how the hell did you get in there so my advice would be no sorry

Just! I am 6'4", and I can just comfortably fit in. I have to watch my head
on big road bumps though, or I'll literally hit the roof. Track days, when
wearing a helmet, get a bit squishy.

A friend's 300ZX has smaller seats fitted (maybe skyline??) - they are much
lower, and would provide a bit of extra space. If seat height is all that
would bother you, look at getting the seats lowered, or an aftermarket
driver's seat. Having a 300ZX is worth mucking around with seats so that you
can fit in them.