Proportioning Valve Kit: 64-85 GM Disc/Drum - BOTTOM MOUNT KIT then do the simple job

then do the simple job of being carefull

use PW220316B

This is the FRONT adjustable window plane support as shown

the smaller adjuster mount and  your other specs are like the image which IS CORRECT

Proportioning Valve Kit: 64-85 GM Disc/Drum - BOTTOM MOUNT KIT then do the simple jobProportioning Valve Kit for GM USA disc brake front, with original or with the disc conversion upgrade with the BOTTOM MOUNT KIT This one allows the PV to mount sideways up under the master cylinder giving more under master clearance etc. GM Kit for Disc Drum; For use with 3 8" Ports; Left Mount Brass Proportioning Valve, Steel Lines, Bracket and Proportioning Valve Plug. ALSO BUY A PVTOOL if you don't have one.. listed under "PVTOOL" This