Well, I built my old hotrod in game. See a resemblance?

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Primary differences: Badges, the badges in the game all say iroc-z tuned port injection, mine said RS. The hood is not right, wheels are wrong, and finally between the fog lights mine said "Camaro" in teal.
Performance wise we built my car accurately in game, saved it, and then went nuts and made it into what it might be today.
I was impressed, a 383 with a cam and exhaust came to about 400 horsepower, then I added my posi, stripped some weight out (I tore the AC as well as un-needed crap out in real life) and upgraded the trans so I could get the gearing right. Came out to a class B, and handled like dog s***. VERY close to how the car felt IRL.
Then we went ahead and added a twin screw super charger, pulled out more wieght, and upgraded the suspension. Came out to a S class car rated at 600 I believe, keeping the 383.