This CHROME BLING KIT  suits those  operating 1964 & 81 era GM Drum REAR or Disc Rear /DISC FRONT  GM brake conversions.

MAKE SURE YOU OR YOUR MECHANIC USES A "PVTOOL" before bleeding this value or you will bugger it up and try and say its faulty.. which it will be... because of the bleeding proceedure.. .. SEE THE HELP listing for Pro Valve assistance.. its free.. do it...!

The proportioning valve body is set up for Disc/Drum & DISC/ DISC set ups.. .. , lines out arethere also for use with 9/16 inch 1/2 inch Ports;  Bottom Mount Chrome Proportioning Valve

If you are thinking about upgrading your Classic vehicle with disc brakes These combination-proportioning valves are based on the popular AC DELCO 172-1353 (disc-drum) and 172-1361 (disc-disc) valves.

These valves contain a low pressure shut off valve and warning light switch to ensure driver and vehicle safety should your brake system lose hydraulic line pressure. 

These are a Aftermarket copy of the GM proportioning valve and added lines and bracket.. good part historically and good value too.