Why did your parents buy you a pink R33? I just can't wrap my head around it. Did they know what a Skyline was before they bought it?
I'm just kidding mate. I think red is definitely where you want to go with the interior though mate. White parkers will make the color stand out more, so that's totally up to you. It's a nice paintjob, regardless of color, so I'd say show it off.
Gauges... can't confirm, as I only have the standard ones, but AFAIK, anything in the view of the driver is out of the question, as is anything that will interfere in a crash. So nothing on the dash in front of you, nothing on the A-Pillar.
AFAIK.