Very good! More than 10 years ago I tried to do this with the sounds of the engines and I couldn't, so I took only the other sounds, like the jigsaw, gear shift and so on, from 3 and Legends.
But I always liked the engine sound of Nascar 3 and Legends, too bad the engine is not the same, because in NR3 the sound is more hoarse and in NR2003 it is high. In fact, I always thought about adapting that hoarse NR1 sound.