Car is still existing and still looks the same. There is even a wikipedia article on it: https://en.wikipedia.org/wiki/The_Reactor_(show_rod)
I used to watch all these shows in the 60s with my Hot Wheels at hand. Now I think I understand the whole Kustom Kar nut thing...its just scaled up! Batmobile, Monkeymobile, Green Hornet Chrysler...