This is a great build! It's always cool to see a replica scale car, especially when it can be done accurately. BTW the factory color on your brother's car is code 61 Burnished Brown Metallic, which is a fairly rare color on any of GM's performance cars. Wheels look like Boss 338's which are very similar to most torque thrust style wheels. Looks like you got the stance nailed down perfectly. Can't wait to see this one finished.