Looks great! Hard to make a good looking model from that kit IMO. Did you have to narrow the tread width at either end to keep the tires under the body? I built one back in the 70s and remember the rear width being too wide.
Sometimes carpet is not a good thing. If you have ever lived in area with a lot of dirt roads and dirt or gravel parking lots you will know how hard it is to keep carpet clean in cars. Dirty carpet equals stinky car.