The '60-'66 Chevy light-duty trucks came with the infamous T3 headlights and I come across them, from time-to-time, on a few of the trucks, Panels & Suburbans I have acquired. I have swapped in T3 lamps on a few of my projects and heard observers comment about them. These trucks will never have the mass-appeal of the more popular/main-stream years, makes & models of cars from the hot-rod era, but when I can, I install the T3 headlamps for the "nice-touch" factor.