The booster mounts with a 4-bolt pattern. The 4 bolts are in a perfect square and are 3 3/8" apart (center to center). This master cylinder will work with any drum/drum, disc/drum, or disc/disc setup.
Chrome Impala Power Booster + Bail Top Master Cylinder & Straight Bracket Kit
8" Chrome Power Brake Booster Conversion Kit Disc Drum For 1958-64 Chevy Impala
1958-64 Chevy Impala 7'' Dual Chrome Power Brake Booster Master Disc Disc Kit
8" Chrome Power Brake Booster Conversion Kit Disc/Drum For 1958-64 Chevy Impala
for Chevy Impala 1958-1964 8" Chrome Power Brake Booster Conversion Disc Drum
