1970 brake system part number verification

[rm6p]

Does anyone have a parts book that can tell if combination brake valve # 3549947 was used for 1970 B-Bodies?

An original mopar training "slide show" on youtube shows a combination valve being used from January 1 1970. I have a valve that is stamped "3258924" "3423936" which I am told is Mopar service part number 3549947. Through internet searches I have only been able to find this part being used on A and E bodies. 1970 being a transition year is making things more difficult.

Plan B is to use the original drum brake safety switch tee and an adjustable proportioning valve instead of the combination valve.

 

[mguesto]

I did a quick search on the net and came up with some info for you.

Here is some text from the site (link) that explains what it was used in.

Original applications include 1973 through 1976 Plymouth Duster, Scamp, Valiant, Dodge Dart, and Demon with front disk and rear drum brakes. The same type of valve was used on other Mopar vehicles from January 1, 1970 - 1976. It's purpose is to detect differences in front-to-rear brake system fluid pressure and to control fluid pressure to the rear drum brakes. When a pressure difference exists, a plunger inside the brass body shifts position and makes contact with a switch, completing a path to ground and illuminating a warning lamp.

Here is the link i found this on : https://www.musclecarresearch.com/1970-76-mopar-combo-valve-autopsy