the back of the 34 Mack that I've posted previously, the neon was designed and installed by the head of Special Effects at 20th Century Studios. (thanks Steve!)

https://www.facebook.com/photo/?fbid=940652774931560&set=a.480813077582201

see a couple photos of the front at https://justacarguy.blogspot.com/2023/01/a-photo-of-neon-sign-fuel-truck-i.html