[SWS911]

Trombone cooler for the 73 was different, not as tall & different oil line attachment, than the 74 up cars. Looks like a later trombone that was "bent" back to sit behind the battery box which were not on the 74 up cars. The oil tank, lines, thermostat and cooler on the 73 are a one year only. They look like the 74 up stuff, but are uniquely different.