3019 - 1978-1988 GM G-Body 12-Bolt Swap Adjustable Upper Control Arms 1987-pontiac-firebird-esi3246161 Driver and passenger seats maintains

Driver and passenger seats maintains full articulation

1" Lowering

That brace is mostly cosmetic and not a crucial part of the chassis

Mercon or GL-4 gear oil are recommended

New rear end housing bushings are an excellent upgrade for your street driven or track used vehicle

3019 - 1978-1988 GM G-Body 12-Bolt Swap Adjustable Upper Control Arms 1987-pontiac-firebird-esi3246161 Driver and passenger seats maintainsThese 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