I only know it's 19 ft from a show I went to in Temora a few years ago.
They had a prize for longest car.
I thought I better hang around, as I probably had a good chance of winning.
I didn't win.
A Chev C30 truck that had been converted into a cab over style 'mini' prime mover won. He only pipped me by 6 inches.
Graciously, I didn't say anything, even though the trophy said "longest CAR", not truck.