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Chevrolet G-body (Monte Carlo, El Camino, Cutlass, Regal, Grand Prix) LS swap (1978–1988)
Swap kits verifiedG-body1 sourced swap recipe
LS Gen III/IV swap — moderate
1978–1988 GM G-body (Monte Carlo, Malibu, Grand Prix, Cutlass, Regal) LS swap: adjustable mounts, controller kit and EFI tank kit (PSI); ICT mount kit also verified.
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| Part | What | Price | ||
|---|---|---|---|---|
| Fuel system | PSI Conversion 78–88 Monte Carlo, 78–83 Malibu & 78–87 Grand Prix EFI Tank Kit (tank kit) | $619.95 PSI Conversion, 2026-09-28 | Required | |
| Mounts | PSI Conversion LS Swap Adjustable Engine Mounts (77–90 Caprice/Impala, 82–92 F-Body, 75–79 Nova, 78–88 G-Body) (adjustable) Also fits Nova/F-body/B-body | $124.99 PSI Conversion, 2026-09-28 | Required | |
| Wiring & ECU | PSI Conversion 99–07 Gen 3 LS/Vortec (24X) Engine Controller Kit, drive-by-cable, w/ 4L60E-75/4L80E control (standalone harness, MAF, flashed ECM, bracket) (Gen 3 24X DBC kit) Ready-to-run option; flashed for application | $1,099 PSI Conversion, 2026-09-28 | Optional |
Required parts we've priced so far: $744.94 (parts only, not a full budget — engine, trans, wiring and labor are extra. Try the swap cost estimator.)
LS swap parts listed for the G-body (Monte Carlo, El Camino, Cutlass, Regal, Grand Prix)
Vendor catalog listings matched to this vehicle by product title. Prices as last checked; confirm fitment with the vendor.
| Type | Product | Vendor | Price | Stock | |
|---|---|---|---|---|---|
| Cooling | LS Lower Radiator Hose - 1982-1988 Chevy G-Body | ICT Billet | $60 | In stock | View |
| Cooling | LS Upper Radiator Hose - 1982-1988 Chevy G-Body | ICT Billet | $60 | In stock | View |
| Engine parts | TR6 High Tech Ignition System for 1986-87 Turbo Buick Grand National V6 | Full Throttle Speed | $524.99 | In stock | View |
| Mounts | LS Engine Mount Kit - G-Body 78-88 | ICT Billet | $260 | In stock | View |
| Mounts | LS/LT Engine Mid Plate - G-Body 78-88 | ICT Billet | $202 | In stock | View |
| Mounts | LS Front Motor Plate - G-Body 78-88 | ICT Billet | $202 | In stock | View |
| Cooling | LS Upper & Lower Radiator Hose Kit - 1982-1988 Chevy G-Body | ICT Billet | $100 | Out of stock | View |
| Headers Exhaust | LS Headers 88-98 2wd OBS 78-87 G-Body | ICT Billet | $380 | Out of stock | View |
Swap kit evidence
- 1978-1988 Chevy G-Body LS Swap Engine Mount Kit — ICT Billet (kit-verified)
Questions about this swap
Every LS swap also needs
An oil pan that clears
Compare GM LS pans by sump position and depth.
Accessory drive spacing
F-body, car, truck and Corvette offsets.
Fuel system sizing
Injector and pump sizing for your power goal.
A transmission
4L60E to 8HP70 behind an LS.
- Monte Carlo/G-Body LS Swap and Conversion Parts — PSI Conversion