Pn# BLK102LMK 64-65 GM-A body Chevelle, Lemans GTO, Cutlass 442, Skylark GS, Dual Master Cylinder conversion with Master cylinder, brake lines and block. Standard 1 bore for manual Front Drum brakes. This is for all 64-65 with drum brakes converting to dual master cylinder from the single master cylinder. This is the master cylinder used on all dual system conversions - it breaks the front and the rear up and separates the one system into two. It fits right in place of the old master and bolts right up.
It has the hard to find correct 1" bore for drum brake cars - the later 1 1/8" master will not work the pedal will be too hard to push in.