airbox lid off can't be a good idea....it's there to keep the air temp down, otherwise it's just sucking the hottest possible air available straight from the bay
I'm not exactly sure what nuts you've got on there, but I'm guessing they'd be some kind of lightweight nut like the rays ones....Sounds like they used the gun on it when you're only supposed to tighten/undo em by hand...
no idea, I was long gone before that ever happened
What clutch are you getting? used to be able to get a nismo clutch kit including lightened flywheel for like $1200 brand new from nengun