This high quality kit will really improve your brake performance. 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 is a great upgrade from a single diaphragm booster.
Chrome Radiator Support Cover Upper fits 1968-1972 Chevy Chevelle 4032-315-681C
1968-1972 Chevy Chevelle With LS Motor Swap Aluminum Radiator/Shroud & Dual Fans
ENGINKUHLER 4-Row Radiator Compatible with 1968-1972 Chevy Chevelle Pontiac GTO Oldsmobile Cutlass 5.7l 6.5l 6.6l 7.4l 7.5l 1969 1970 1971 w/ 12'' Fans
Marketplace Auto Parts Radiator Support Cover - Top Panel - 4-Bolt Style - Compatible with 1968-1972 Chevy Chevelle
Radiator Support Chrome Cover Upper fits 1968-1972 Chevy Chevelle 4032-315-680C
1968 1972 Chevy Chevelle 11" Power Brake Booster Master Cylinder with Bleeders