You can find out the trim level of your car by entering the VIN # here
http://www.vindecoderz.com/EN/Nissan/350Z Many cars got dealer installed leather, none had a fairlady badge, that would be aftermarket.
The #1 cylinder is the one positioned furthest forward, which is the passenger side making the passenger side bank 1. As for left and right sensors, Exhaust cam sensor left and intake is right on bank 1, On bank 2 (drivers side) intake cam is left sensor, and exhaust is right sensor. I don't know why they don't just call them "bank 1, Intake" and "bank 1 exhaust". Hope that clears things up.