Malibu - El Camino Chassis Reference

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Living in the Past
Supporting Member
Jul 19, 2009
Permanent Temporary
Swiped from

The chassis drawings may be useful for other models:
The El Camino and wagons share dimensions.
The coupes and sedans share dimensions.

Metric Frame Info
I ran across this last week and I figured there would be a few others that would like to save it.....

1978-1988 A & G-Body Chassis Information

The purpose of this page is to try and document some of the FAQs about the '78-'88 A& G body cars. The majority of the cars produced were the Buick Regal, Chevy Monte Carlo, Oldsmobile Cutlass, and Pontiac Grand Prix. The earlier cars include the Chevy Malibu ('78-'83) and El Camino ('78-'87), Pontiac Bonneville ('78-'87 4-door), and Pontiac Grand Am and Le Mans ('78-'80 2-door). GMC also had their own version of the El Camino known as the Caballero.

- Body Mount Bolt Information (1982-88)

There are three different size bolts.
Position 1 uses GM P/N 10049638 (sold ea., 2 needed). Bolt is 12 X 1.75 X 95mm long.
95mm is not common so you have to use 100mm.

Position 3 uses GM P/N 14085301 (sold by pkgs. of 5, 2 needed). Bolt is 10 X 1.5 X 55mm long. Also need two nuts.

Position 2, 4, 6, 7 uses GM P/N 3524497 (sold by pkgs. of 5, 8 needed). Bolts are 10 X 1.5 X 80mm long.

- Interchangeable Parts Between the G-bodies - Mechanical

• Complete front suspensions (Upper/lower front A-arms, spindles, calipers, steering linkage, steering boxes)
• All Brake Parts (lines, hoses, calipers, pads, rotors, bearings, etc.)
• Dual-diaphragm brake boosters can (and should) be swapped for the single-diaphragm boosters
• Complete Rearends (ex. an '87 Monte SS posi 3.73 rear will fit in an '81 Olds Cutlass)
• F41 Sway Bars into non-F41-equipped cars
• Grand Prix triangulating frame brace (ties the lower F-41 engine cradle-to-frame bars together)
• '78-'80 4-door Bonneville fender braces or '81-'87 Grand Prix fender braces (from fenders to upper radiator support)
• Entire Engine-bay HVAC assembly (where A/C and heater core mount to firewall)

- Interchangeable Parts Between the G-bodies - Interior/Exterior

• '81-'88 Olds Cutlass coupe doors fit '81-'87 Buick Regals, and vice-versa
• '81-'88 G-body interior wiring to add or repair power windows/ locks/ trunk
• Steering columns between similar years
• All weatherstripping (coupes)
• Outer windshield trim and wiper arms (coupes)
• Drip-rails above the windows (coupes)
• Lower door panels, along with most upper door panels
• Most interior trim (A and B-pillars, factory T-top trim, lighted vanity mirrors, and headliner boards)
• Seat belts and actuators
• Carpet
• Stainless-steel "Body by Fisher" door sills
• Front seats (bench or buckets. To install buckets in a solid-bench car, get the bucket seats, tracks, and mounting plates with studs from the floor of the donor vehicle, and weld the plates in.)
• Rear seats
• Rear package shelf (and CHMSL for '86-up vehicles, fed. mandated)

- Additional Parts from Donor Vehicles

• '82-'02 S-10 upper/lower A-arms and spindles
• '82-'92 F-body lower front A-arms - steering stops need to be ground down, but fit perfectly
• '82-'92 F-body lower rear control arms
• '82-'92 F-body front sway bar (34 or 36mm bars)
• '82-'84 F-body aluminum rear brake drums
• '87-'92 F-body aluminum radiator (5.7/auto application - Modine 951)
• '87-'92 F-body XH steering box for 16" wheel upgrade
• '88-'92 F-body serpentine belt setup for SBCs - use F-body alternator, p/s pump, A/C compressor, condenser, and lines
• '78-'96 B & D-body front spindles for 12" brake conversion
Note: The big-brake upgrade with factory parts requires aftermarket tubular upper control arms. '78-'90 is trial-and-error; most cars got 11" brakes, while wagons and 9C1s received the 12" brakes. A sure-fire winner for 12" brake spindles is any B-body from '91-'95. 1996 B-body taxi/police cars and & D-body limos have larger lower ball joints, so these spindles should be avoided. Regular '96 B-body spindles are fine.
• '84 S-10 manual brake drum rear wheel cylinders (Raybestos WC37644)
• 1990 B-body master cylinder (Wagner 104660)- for use with 12" brake conversion

- 1LE Bushing Part Numbers

• Rear trailing arms - 10164152

- Moog Problem Solver Part Numbers

• Upper Control Arm Bushing/Kit - K6411
Cad-plated shells with higher durometer rubber (kit includes 4 bushings)
• Lower Control Arm Bushing/Kit - K6421
Cad-plated shells with higher durometer rubber (kit includes 4 bushings)
• Sway Bar Endlinks - K8988
Cad-plated bolts, nuts, sleeves, and washers with polyurethane bushings
• Front Sway Bar Bushing Kit -Thermoplastic - 'without tabs on mounting clamp' - one req'd
K6451 - 1"
K6453 - 1 1/8"
K6455 - 1 1/4"
K6457 - 1 5/16"
K6459 - 1 7/16"
• Idler Arm - K6187T
Bolt-in heavy-duty idler (same as '91-'96 B-body)
• Lower Balljoints - K6145T
Heavy-duty lower balljoint
• Outer Tie Rod Ends - ES2033RLT
• Inner Tie Rod Ends - ES2034RLT
• Tie Rod Sleeves - ES2032S
• Center Link - DS909


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Comic Book Super Hero
Supporting Member
Feb 2, 2015
Calgary, Alberta, Canada
Wow. Some really great info here. This should help with some of the FAQ on here, esp by the newer members.
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