Vertical Car Shipping In an effort to cut shipping costs with its brand new 1971 Vega Chevrolet worked with Union Pacific to develop Vert-A-Pac which allowed 30 cars to be shipped versus 18 that a normal boxcar could carry. Because of the vertical shipping method, the railcars were taller than normal forcing the railroad line to follow special routes to avoid low overpasses. According to Collectible Automobile The Vegas had four removable steel sockets inserted into the undercarriage. As the Vert-a-pac car doors were lifted and closed the Vegas would roll forward an catch on hooks on the doors. When the doors were fully shut the Vegas were suspended side by side, roof to roof. The Vegas engine oil pan had a special baffle to keep oil from seeping into the number 1 cylinder while the cars were vertical. The battery caps, carburetor float bowls and windshield washer fluid reservoirs were also designed to prevent fluids from leaking during shipping.