Really an un-answerable "favorite" question, but this would be in the top bunch.
K-Line die-cast flat with I-beams. I like the car in general, very close in basic structure to a car in photos I have of a NYC example, and I painted/lettered it for the NYC. The decals are correct and I used some of those 3-D "rivet decals" to backdate the car.
It used to look like this - a modern welded H-D flat. K-line helped in the project by putting the wrong trucks on a modern car (older, plain-bearing types), so that helped with the back-dating.
