Option code for brake booster 1972- A-body

[Syleng1]

We are under taking a restoration on a 72 Dodge Demon 340 -4 speed at work.
Does anyone know what was the option code for the power brakes?
Non of the fender tag codes show anything for power brakes.
Thanks,
Joe

 

[A56]

We are under taking a restoration on a 72 Dodge Demon 340 -4 speed at work.
Does anyone know what was the option code for the power brakes?
Non of the fender tag codes show anything for power brakes.
Thanks,
Joe

Probably only on build sheet, just like power steering isn't on fender tag.

 

[LM29H2B]

B51 is the code for power brakes and it would be on the fender tag