Brake proportioning

[cdrod]

Inline Tube sells a combination valve that was used on '70 Cutlass models (A-body) disc-drum cars and '70-'72 drum-drum brake cars. This valve does not have the proportioning function built-in. The '70 disc-drum cars used a secondary valve at the rear of the car to handle the drum proportioning for the rear wheel cylinders; the '71 and later valves were called combination valves because they were both a distribution and proportioning valve.



I don't know if this part is similar to the 2nd gen F-body so do your homework, the part number is PR107 and sells for around $80. I'm using this valve along with a rear proportioning valve at the master cylinder on my '72 442 convertible project; C5 front w/13" rotors and '01 Blazer w/11.6" rear discs.

Here's a pic of the valve from Inline Tube.

Rodney