Take it from someone that has built a couple of sleepers in his days. The wheel tire package needs to match the overall rust , dirt , filthy patina package.
The stance and wheel package gives away what might be lying underneath. If he just wanted the filthy patina I put all my coin into go fast drivetrain components, and don't care about looks, he is spot on. If he is a serious street racer looking to win some money that car would draw TOO much attention. First rule of street racing is stealth... It is a difficult concept to achieve- Look like crap and go like Hell .