Also GATX 56640, a PTC-built car with an enormous dome (looks to be as wide as the main tank shell), and GATX 61546, an insulated AC&F Type 27.
On the two trucks in front of GATX 30636, the three visible journal boxes each have a different style of cover.
GATX 5359 has a center tank anchor in addition to the original outboard pair, and appears to be stenciled "LEAKY TANK ..." with some instructions below.
David Thompson