They are expensive to maintain. Sending the brake combination valve off my 77 F150 for a complete rebuild. Folks that do niche work that isn't done anymore can name their price. On the upside they are typically top notch. If all the other brake parts are gonna be new, no sense in not servicing the brains of the system. After 49 years it was probably due.
I enjoy the comfort of my new truck, but also love the quarter windows open, windows down, and the smell of raw exhaust.
This right here. They are expensive to maintain and the main reason I sold mine.
Plus it only got 10-11 mpg at any speed.
Yes it was a blast to drive but just became too difficult ( for a 72 year old) and expensive to maintain
