UMI Performance Rear Adjustable Upper Control Arms - 12-Bolt Swap - Black (1978-1988 GM G-Body) (3019-B)
Perform a seamless 12-Bolt rear end conversion into your vehicle while maintaining perfect driveline geometry and zero rear end bind with UMI Performance Adjustable Rear Upper Control Arms for 12-Bolt Swap (3019-B). Designed specifically for installing a 1964-1972 GM A-Body 10-bolt or 12-bolt rear end into 1978-1988 GM G-Body chassis—including the Buick Grand National/Regal, Chevrolet Monte Carlo, El Camino, Oldsmobile Cutlass, and Pontiac Grand Prix—these specialized conversion upper control arms are built with the correct angle to mate the G-Body chassis frame mounts to the A-Body axle housing ears.
Attempting a 12-Bolt axle swap with stock G-Body upper arms causes extreme suspension binding, severe driveshaft angle misalignment, vibration, and dangerous handling. UMI swap control arms feature right- and left-hand turnbuckles for easy on-car adjustment, allowing you to set exact pinion angle and axle position right in your shop or at the track. Constructed with 4140 chromoly threaded tube adapters, heat-treated zinc-plated 4140 chromoly adjusters, and Teflon/Kevlar-lined QA1 3/4" spherical rod ends with CNC-machined 6061 aluminum step bushings, these arms deliver 100% bind-free articulation for drag racing, autocross, and high-performance street use. Finished in a durable black powder coat, this direct bolt-on set includes all necessary adjusters.
Features
- Specifically designed to install a 1964-1972 GM A-Body 10-bolt or 12-bolt rear end housing into a 1978-1988 GM G-Body chassis
- Correctly angled construction corrects mounting points between G-Body frame mounts and A-Body housing ears
- On-car adjustability using right- and left-hand threads allows fast, precise pinion angle tuning without unbolting arms
- Eliminates suspension binding, severe driveline vibration, and incorrect driveshaft angles associated with factory arms
- Constructed with 4140 chromoly threaded tube adapters and heat-treated 4140 chromoly zinc-plated adjusters
- QA1 3/4" hard chrome plated, Teflon/Kevlar-lined self-lubricating race rod ends for bind-free articulation
- Precision CNC-machined 6061 aluminum step bushings
- 100% TIG-welded fabrication for maximum structural strength and safety
- Durable black powder coat finish for superior corrosion and chip resistance
Specifications
- SKU: 3019-B
- Manufacturer: UMI Performance
- Material: 4140 Chromoly Adapters & Heat-Treated Adjuster with Heavy-Duty Steel Brackets
- Bushing / End Type: QA1 3/4" Spherical Rod Ends (Teflon/Kevlar Lined)
- Adjustability: On-Car Adjustable
- Finish: Black Powder Coat
- Weight: 9 lbs
- Product Dimensions: 14" x 6" x 6"
- Hardware: Uses OEM Hardware (Not Included)
- Modification Required: None (For GM A-Body 12-Bolt Swap Applications)
Fitment Notes
- Position: Rear Upper Control Arms.
- Fits 1978-1988 GM G-Body chassis when swapping in a 1964-1972 GM A-Body 10-bolt or 12-bolt rear end housing.
- Compatible with Buick Regal/Grand National, Chevrolet Monte Carlo, El Camino, Malibu, Oldsmobile Cutlass, Pontiac Grand Prix, Bonneville, GMC Caballero.
- Required for proper alignment and binding elimination during A-Body to G-Body rear housing swaps.
Fitment
1978 Buick Regal
1979 Buick Regal
1980 Buick Regal
1981 Buick Regal
1982 Buick Regal
1983 Buick Regal
1984 Buick Regal
1985 Buick Regal
1986 Buick Regal
1987 Buick Regal
1978 Chevrolet El Camino
1979 Chevrolet El Camino
1980 Chevrolet El Camino
1981 Chevrolet El Camino
1982 Chevrolet El Camino
1983 Chevrolet El Camino
1984 Chevrolet El Camino
1985 Chevrolet El Camino
1986 Chevrolet El Camino
1987 Chevrolet El Camino
1978 Chevrolet Malibu
1979 Chevrolet Malibu
1980 Chevrolet Malibu
1981 Chevrolet Malibu
1982 Chevrolet Malibu
1983 Chevrolet Malibu
1978 Chevrolet Monte Carlo
1979 Chevrolet Monte Carlo
1980 Chevrolet Monte Carlo
1981 Chevrolet Monte Carlo
1982 Chevrolet Monte Carlo
1983 Chevrolet Monte Carlo
1984 Chevrolet Monte Carlo
1985 Chevrolet Monte Carlo
1986 Chevrolet Monte Carlo
1987 Chevrolet Monte Carlo
1988 Chevrolet Monte Carlo
1978 GMC Caballero
1979 GMC Caballero
1980 GMC Caballero
1981 GMC Caballero
1982 GMC Caballero
1983 GMC Caballero
1984 GMC Caballero
1985 GMC Caballero
1986 GMC Caballero
1987 GMC Caballero
1978 Oldsmobile Cutlass
1979 Oldsmobile Cutlass
1980 Oldsmobile Cutlass
1981 Oldsmobile Cutlass
1982 Oldsmobile Cutlass
1983 Oldsmobile Cutlass
1984 Oldsmobile Cutlass
1985 Oldsmobile Cutlass
1986 Oldsmobile Cutlass
1987 Oldsmobile Cutlass
1988 Oldsmobile Cutlass
1982 Pontiac Bonneville
1983 Pontiac Bonneville
1984 Pontiac Bonneville
1985 Pontiac Bonneville
1986 Pontiac Bonneville
1978 Pontiac Grand Prix
1979 Pontiac Grand Prix
1980 Pontiac Grand Prix
1981 Pontiac Grand Prix
1982 Pontiac Grand Prix
1983 Pontiac Grand Prix
1984 Pontiac Grand Prix
1985 Pontiac Grand Prix
1986 Pontiac Grand Prix
1987 Pontiac Grand Prix
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