On the bottom of the back side of the drum, there is an oval, black rubber piece. Remove it and there is a gear inside that is used for adjusting.
The 1967 Ford Mustang had hydraulic brakes
Brakes are adjusted automatically
My 1971 Ford Mustang , fastback , with 351 Cleveland , 4 barrel , had drum brakes on the front
No.
how to change front and rear brakes on a 2003 ford mustang V-6
https://www.youtube.com/watch?v=tb1ul7yZ3FU The above decribes how to adjust the brakes on the ford 2000, 3000, and 5000 tractors.
With a hacksaw.
Depends on how old and how the older one was equipped
No , just the 2.3 liter 4 cylinder or the 5.0 liter V8 engines were available in a 1989 Ford Mustang
Depends on the engine
Yes
How do I adjust my emergency brakes on my 1999 ford expidition?