Your smell is likely fuel evaporating from your warm carb after a drive. Today's fuel is much more volatile than the fuel that our old cars' system was designed for. Another related problem is poor starting after the car sits for a while because the fuel has left the carb bowl. The fuel pump now has to pull gas all the up from the tank to replenish the carb. My own 1967 R/T has always suffered from these conditions; stinky garage and prolonged starting.
This past summer, I had the top end of my 440 apart for a repair. When I was reassembling it, I took the opportunity to block off the heat riser ports from the heads to the intake manifold. Although doing this eliminates much of the heat to carb, I only drive my car in warm weather and the carb has an electric choke on it, so it is not dependant on manifold heat to operate correctly. Since doing this modification, my car no longer stinks up the garage with fuel evaporating from a hot carb. I also find my engine starts much better, even after sitting one or two weeks, because there is still fuel in the carb.