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Big-Brake Upgrade For GM A/G-Bodies

Swapping From The 10.5-inch Stockers To 12-Inchers

Photography by Henry De Los Santos, Tony Nausieda
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    With the ’Bu on jack stands, we first removed the cotter pin and nut from each outer tie rod end to separate it from the steering arm. Then we placed a floor jack underneath the lower A-arm, removed its cotter pin, and loosened the nut.
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    With the ’Bu on jack stands, we first removed the cotter pin and nut from each outer
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    Next, place the pickle fork between the ball joint and the tapered seat (do this to both the upper and lower ball joint) and give it a good whack with a hammer until the spring pressure snaps down on the castle nut. Finally, raise the floor jack just enough to release the spring pressure. Remove both nuts and the brake line, and you can now take out the spindle, caliper, and rotor as one assembly.
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    Next, place the pickle fork between the ball joint and the tapered seat (do this to both t
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    The new Hotchkis upper control arms are significantly different from the stock ones. Since we’re going to a taller spindle to house the huge 12-inch 1LE brakes, the new arm corrects the altered geometry to improve negative camber and increase caster for more stability.
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    The new Hotchkis upper control arms are significantly different from the stock ones. Since
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    While we had the front suspension torn apart, it only made sense to replace the ratty springs with a set of Hotchkis performance coils. And we can’t emphasize this enough: Put a safety chain around the spring. Use a jack and secure it to the lower A-arm. Remove the shock and gently lower the arm until it’s fully extended to get the spring out or use a coil compressor. For the rear springs, simply raise the rearend with a floor jack and loosen the shocks. Lower the jack and you should be able to remove the springs by hand. Then reverse the process.
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    While we had the front suspension torn apart, it only made sense to replace the ratty spri
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    When putting on the new upper control arms, be sure to have the short leg towards the front of the car. Reinstall the original alignment shims in the same location, and torque the two nuts to 45 lb-ft. The Hotchkis arms have a cross-shaft that can be rotated for positive or negative camber adjustment. Out of the box, they come pre-assembled for maximum negative camber. If proper alignment cannot be obtained, rotate the cross-shaft 180 degrees to correct the situation.
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    When putting on the new upper control arms, be sure to have the short leg towards the fron
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    After 23 years of road duty, the tie rods, ball joints, idler arm, and centerlink were trashed. So we went ahead and replaced them after a visit to Kragen. Just be sure to measure the old tie rod lengths to get it somewhat close enough to drive to the alignment shop.
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    After 23 years of road duty, the tie rods, ball joints, idler arm, and centerlink were tra
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    We then pressed out the old lower A-arm ball joint and cleaned up the nasty looking things.
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    We then pressed out the old lower A-arm ball joint and cleaned up the nasty looking thin
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    After pressing in the new lower A-arm ball joint and fogging the lower arm black, we carefully pushed the ball joint boot on by hand.
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    After pressing in the new lower A-arm ball joint and fogging the lower arm black, we caref
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    We got the complete large spindle assembly at the yard off of an ’84 Caprice Wagon for $30 including the dust shields! A quick cleanup and a few coats of Eastwood’s Spray Gray aerosol paint made them look better than new.
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    We got the complete large spindle assembly at the yard off of an ’84 Caprice Wagon fo
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    Before installing the new springs, we taped the top of the rubber perch to the springs (be sure to replace it or else it’ll sound like a mouse cruising down the street) so it wouldn’t move around while we installed them. Then direct the end of the springs between the two drilled holes to get the correct ride height. Since the springs were quite a bit shorter than the factory units, we didn’t need to use a spring compressor. Instead we used a block of wood to protect the lower A-arm and jacked up the springs into position and reinstalled the shocks.
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    Before installing the new springs, we taped the top of the rubber perch to the springs (be
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    Next we installed our “new” spindles. After the monster 1LE rotors were placed, we used a healthy dose of grease to pack the inner and outer bearings and torque the nut to 12 lb-ft while turning the rotor by hand to seat the bearings. We backed off the nut until it was just finger tight, and retightened it just enough to slide the cotter pin through the spindle.
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    Next we installed our “new” spindles. After the monster 1LE rotors were placed,
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    Once the calipers were seated, we used stock brake lines listed for the ’84 Caprice Wagon to connect to the stock Malibu brake lines. The length was correct—for the first time we guessed right (it was an educated guess of course)!
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    Once the calipers were seated, we used stock brake lines listed for the ’84 Caprice W
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    We didn’t have to do this, but again, since “everything” was torn apart we went ahead and replaced the poor excuse for a sway bar from the factory to the huge carbon-steel 1-1/4-inch Hotchkis Performance sway bar. The kit came with everything necessary for installation including the polyurethane bushings, endlinks, and all the hardware.
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    We didn’t have to do this, but again, since “everything” was torn apart we
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    It may not be the prettiest thing on the road right now, but what starter project is? We just aren’t sure what’s worse—borrowing our Fire-Turd’s wheels to accommodate the larger 12-inch brakes or refusing to put all four wheels on the car. But like any proud parent; we think the ’Bu is beautiful.
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    It may not be the prettiest thing on the road right now, but what starter project is? We j

Our '78 Malibu was a less-than-stellar braking performer, so we decided to toss out the pathetic 10.5-inch discs and do the popular 12-inch conversion. All that’s required are new calipers, rotors from an ’88-’92 1LE Camaro, and larger spindles out of some ’78-’90 GM fullsize cars such as the Caprice, Delta 88, Caddy, and Pontiac (typically wagons, heavy-duty towing packages, and police cars). You should also go with a set of aftermarket upper control arms like those from Hotchkis Performance or else you’ll end up with way too much camber—the Hotchkis units feature a tubular construction and come with the ball-joints already pressed in and ready to bolt-on. Although Hotchkis does offer a complete kit that’s ready to be assembled, we wanted to see how hard or how easy it would be to sort out the individual pieces for ourselves. Finding the spindles was a cakewalk, and so was pulling the correct dust shield and calipers out of an ’84 Caprice wagon. Unfortunately, the calipers looked as if they had seen better days, so rather than trying to salvage them we decided to purchase a refurbished set and gathered the rotors and miscellaneous parts at our local Kragen.

SOURCES
CSK Auto Inc. Hotchkis Performance
12035 Burke St., Ste. 13
Santa Fe Springs
CA  90670
877-466-7655
www.hotchkis.net
Goodmark Industries Inc.
625-E Old Norcross Rd
Lawrenceville
GA  30045
The Eastwood Co.
263 Shoemaker Rd.
Pottstown
PA  19464
800-345-1178
610-644-0560
www.eastwoodco.com
By Henry De Los Santos
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