I'll tell you what I tell my own kids about fixing up their cars and what I've learned from personal experience.
Cops look out for young kids driving and to a point, they look to pick on them just to let them KNOW that they're being watched. Anything you do to your car will attract their attention. The more extreme the modifications, the more attention you'll get.
I had one fast electric blue '67 Impala SS that I had to sell because I was hassled so bad when I drove the car. I had lent it out to a friend that got chased by a cop and he lost the cop, but they never forget!
Bob