"AB Valves. Just the dimensions that make up the boxy shapes would probably do as I’m pretty sure I’m just going to plumb the pipes right thru the sides w/o worrying about the various fitting faces."
Dave,
Currently there are numerous WABCo "AB" Brake manuals at Abebooks ranging from 5 bucks to about 15. These don't contain the actual dimensions of the components but do offer both great photos and schematics. Knowing set dimensions between the mounting positions of the reservoir can be used to extrapolate dimensions for the three basic components.
Another option would be to purchase a Grandt Line O scale "AB" set (Part #3049) and use it for scaling. The set is beautifully done and quite accurate.
