Hard to say about the paint and body without seeing it in person unfortunately,so I won't touch that.On the giggle juice,how much do you know about it?If that's an original car and motor I wouldn't due to it's value.Nitrous is a weird thing.First thing is are you good with engine tuning.All nitrous does is ad 2 more molecules of oxygen to your fuel,the rest of the stuff just goes out the exhaust.Since you have more air you need more fuel pumped through a second fuel supply that is triggered to only work with the nitrous.You can get a low horsepower kit for usually $500 +/- that has just about everything to install it-bottle,lines,carb plate,fuel solenoid,timing retard,etc.These kits are fine,but if you want to play big you install fuel and nitrous injectors in the intake for each cylender.Big $.Remember too that all this extra power is hard on the bottom end unless you build the motor to handle it.More big $.Back to the tuning,you need to be good or have a wrench that knows this stuff.There's been alot of motors blown to smitherines over this stuff,and they aren't usually fixable.Remember the old days of drag racing when a backfire shot the blower a few hundred feet straight up?Nitrous isn't as spectacular,but it will scatter things around.Oh,this stuff is only used at wide open too.If you have a standard trans,don't let up on shifts.Learn to speed shift and have a rev limiter.Letting off for a shift is a good way to get a misfire or backfire,then it might be kaboom.