# UMI Performance 78-88 GM G-Body 12-Bolt Swap Adjustable Upper Control Arms These control arms from UMI Performance are designed to bolt a 1964-1972 GM A-Body 10-Bolt or 12-Bolt rear end into a 1978-1988 GM G-Body; this includes Monte Carlo, Malibu, El Camino, Regal, Grand National, Grand Prix and Cutlass. These upper control arms are built at the correct angle to attach to the G-Body chassis as well as the A-Body rear end "ears". These control arms are a must any time this swap is being completed. Using factory control arms will cause drastic rear end bind and incorrect driveline angle, this leads to traction lose, vibrations and unsafe handling. These control arms are supplied adjustable for easy on-car adjustability to set correct pinion angle and allow adjustment for installation if needed. Adjustments are made using an aircraft quality 4140 Chrome Moly heat treated adjuster and QA1 spherical bearing rod end. The QA1 rod end allows rear end free movement when high handling, auto cross or road race is a concern; it also works excellent as a drag race item by eliminating rear end bind. Upper control arms feature TIG welded construction, 4140 Chrome Moly tube adaptors to ensure thread durability and brilliant powder coat. Features: - TIG Welded Construction - 4140 Chrome Moly Tube Adaptors - CNC Machined 6061 Aluminum Step Bushings - Durable Long Lasting Powder Coat Finish - 4140 Chrome Moly Heat Treated Zinc Plated Adjuster - On-Car Adjustability using Right and Left Hand Threads - Features Precision CNC Machining to ensure Tolerances - QA1 3/4" Hard Chrome Plated, Teflon/Kevlar Self Lubricating Race Rod End This Part Fits: Year Make Model Submodel 1978-1987 Buick Regal Base 1988 Buick Regal Custom 1982-1983 Buick Regal Estate Wagon 1987 Buick Regal GNX 1984-1987 Buick Regal Grand National 1978-1988 Buick Regal Limited 1982 Buick Regal Limited Turbo 1978-1982 Buick Regal Sport 1983-1986 Buick Regal T-Type 1978-1981 Chevrolet Malibu Base 1978-1983 Chevrolet Malibu Classic 1978-1980 Chevrolet Malibu Classic Estate 1978-1981 Chevrolet Malibu Classic Landau 1979-1980 Chevrolet Malibu Classic Sport 1979-1980 Chevrolet Malibu Estate 1979 Chevrolet Malibu Landau 1979 Chevrolet Malibu Police 1979-1980 Chevrolet Malibu Sport 1979,1981-1988 Chevrolet Monte Carlo Base 1983 Chevrolet Monte Carlo CL 1978-1981 Chevrolet Monte Carlo Landau 1986-1988 Chevrolet Monte Carlo LS 1978,1980 Chevrolet Monte Carlo Sport 1983-1988 Chevrolet Monte Carlo SS 1980 Oldsmobile Cutlass Base 1980-1981 Oldsmobile Cutlass Brougham 1980-1981 Oldsmobile Cutlass LS 1978-1979 Oldsmobile Cutlass Vista Cruiser 1979 Oldsmobile Cutlass Vista Cruiser Brougham 1978-1988 Pontiac Grand Prix Base 1981-1987 Pontiac Grand Prix Brougham 1984-1988 Pontiac Grand Prix LE 1978-1983 Pontiac Grand Prix LJ 1988 Pontiac Grand Prix SE 1978-1980 Pontiac Grand Prix SJ 1988 Pontiac LeMans Aerocoupe 1988 Pontiac LeMans Aerocoupe YL 1978-1981,1988 Pontiac LeMans Base 1978-1981 Pontiac LeMans Safari 1988 Pontiac LeMans SE 1988 Pontiac LeMans Value Leader ## Details - **Price:** 436.72 CAD - **Vendor:** UMI Performance - **Type:** Control Arms ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 436.72 CAD | In stock | ## Images - Photo - Primary --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/umi-performance-78-88-gm-g-body-12-bolt-swap-adjustable-upper-control-arms) > Updated: 2026-07-01