Hotchkis 1101C Tubular Upper Control Arms, 64-72 GM A-Body, For Tall Spindle Swap - Manual (Page 4)

A-ARM INSTALLATION NOTES
1978 TO 1988 A/G BODY CARS:
The master cylinder must be changed to one with a 1.125” bore. The optimum set-up
is to use the master cylinder and proportioning valve that matches the new calipers. The
master cylinder from a 1970 to 1981 Camaro or a 1978 to 1996 Caprice will bolt to the stock
power booster without modification. On some cars you may have to reverse the brake lines at
the master cylinder. The hex on both lines is the same, but the thread size is different and the
lines will only go one way.
On Buick turbo cars the electric power booster will have to be changed to a vacuum
type booster, the brake pedal will also have to be changed (see parts list). Install a 3/8-inch
“T” fitting in the rubber hose to the PCV valve and run a vacuum line to the check valve at
the booster. Do not cut wiring to the original booster, tape the plug securely and leave in the
car.
1982 TO 1993 S-10 2WD:
Same as A/G, but hard lines between master cylinder and proportioning valve must be
reversed. You will need to fabricate new lines to do this.
1964 TO 1972 A BODY CARS:
If converting from drum brakes use the master cylinder; booster and proportioning
valve from a 1967 to 1972 disc brake A body car.
Turn base of lower ball joints to 2.010” See Fig 2 (see parts list) or you can purchase the
already turned down ball joint from Hotchkis Performance part # 1155
IMPORTANT!!! REMOVE BRAKE LINE MOUNT ON FRAME AND REPOSITION
APPROXIMATELY ¾ INCH LOWER TO PREVENT BRAKE LINE INTERFERING
WITH SUSPENSION TRAVEL. MAKE SURE THERE IS ADEQUATE
CLEARANCE BEFORE DRIVING THE CAR.