The entire Holley swap system (brackets, mounts, oil pans, accessory drives, etc.) is designed to decrease your total swap installation effort and cost, while increasing the engineered quality of your vehicle and compatibility of these components with other popular aftermarket components. The experts at Hooker BlackHeart have taken away the guesswork of where to position your engine swap and we've followed up on our popular GM G-Body LS line with a new version that allows you to choose LS or LT engines by utilizing 4th Gen F-Body clamshell engine mounts. To complete the engine mounting be sure to follow these steps: 1). Choose the proper clamshell for your engine: Gen III/IV (LS) - 71221018HKR Gen V (LT) - 71221019HKR 2). Add the thru bolt kit: GM LS/LT/Gen III Hemi - 71223015HKR 3). Choose the polyurethane insert in the color you prefer: Black - 71221016HKR Red - 71221017HKR For the transmission, this kit is designed to be used with the same G-Body transmission crossmember already in production (12644HKR-1) for a trouble-free installation and optimized driveline angles. This system is compatible with almost any popular GM transmission, even modern 6-speed, 8-speed, and 10-speed applications. An adapter kit may be necessary for applications that were NOT equipped with a 200-4R transmission from the factory - Part # 12647HKR. 12644HKR-1 - Transmission Crossmember (no additional adapter needed for TH400/200R4/T-56/Magnum) 12655HKR - 4L60/65/70/75 Transmission Adapter - use with 12644HKR-1 12656HKR - 4L80/85 Transmission Adapter - use with 12644HKR-1 BHS5181 - 10L80/10L90 Car Transmission Adapter - must be used with both BHS5182 and 12644HKR-1 BHS5182 - 6L80/90, 8L45/80/90, 10L80/90 Transmission Adapter - use with 12644HKR-1 BHS5183 - Tremec TKX 5-Speed Transmission Adapter - use with 12644HKR-1 *For installing a 10-speed GM car transmission, both BHS5181 and BHS5182 will be used together to achieve the proper spacing and alignment.

Manufacturer installation notes

Integral part of the Complete Hooker BlackHeart swap system for this application. Components feature unique design geometry that is not compatible with any other brand of transmission crossmember.

Manufacturer-listed applications

Match the engine, body, trim and installation requirements. All qualifications shown for an application apply together. Where this part requires a modified or aftermarket assembly, the vehicle listing alone does not confirm compatibility with factory equipment.

Vehicle	Configuration and qualifications
1978–1981 Buick Century 1978–1982 Buick Regal 1979–1980 Chevrolet Malibu 1978, 1980 Chevrolet Monte Carlo	Quantity: 1 Submodel: Sport Application notes: LT Swap
1978–1981 Buick Century 1978–1982 Buick Regal 1979–1980 Chevrolet Malibu 1978, 1980 Chevrolet Monte Carlo	Quantity: 1 Submodel: Sport Application notes: LS Swap
1978–1981 Buick Century 1978–1987 Buick Regal	Quantity: 1 Submodel: Limited Application notes: LT Swap
1978–1981 Buick Century 1978–1987 Buick Regal	Quantity: 1 Submodel: Limited Application notes: LS Swap
1978–1979 Buick Century	Quantity: 1 Submodel: Custom Application notes: LT Swap
1978–1979 Buick Century	Quantity: 1 Submodel: Special Application notes: LS Swap
1978–1979 Buick Century	Quantity: 1 Submodel: Custom Application notes: LS Swap
1978–1979 Buick Century	Quantity: 1 Submodel: Special Application notes: LT Swap
1980–1981 Buick Century 1979–1980 Chevrolet Malibu	Quantity: 1 Submodel: Estate Application notes: LT Swap
1980–1981 Buick Century 1978–1987 Buick Regal 1978–1987 Chevrolet El Camino 1978–1981 Chevrolet Malibu 1979, 1981–1988 Chevrolet Monte Carlo 1978–1987 GMC Caballero 1978–1984 Oldsmobile Cutlass Calais 1980, 1987 Oldsmobile Cutlass 1978–1980, 1985–1987 Oldsmobile Cutlass Salon 1980–1983 Oldsmobile Cutlass Cruiser 1978–1987 Oldsmobile Cutlass Supreme 1982–1986 Pontiac Bonneville 1978–1980 Pontiac Grand Am 1978–1983 Pontiac Grand LeMans 1978–1987 Pontiac Grand Prix 1978–1981 Pontiac LeMans	Quantity: 1 Submodel: Base Application notes: LS Swap
1980–1981 Buick Century 1978–1987 Buick Regal 1978–1987 Chevrolet El Camino 1978–1981 Chevrolet Malibu 1979, 1981–1988 Chevrolet Monte Carlo 1978–1987 GMC Caballero 1978–1984 Oldsmobile Cutlass Calais 1980, 1987 Oldsmobile Cutlass 1978–1980, 1985–1987 Oldsmobile Cutlass Salon 1980–1983 Oldsmobile Cutlass Cruiser 1978–1987 Oldsmobile Cutlass Supreme 1982–1986 Pontiac Bonneville 1978–1980 Pontiac Grand Am 1978–1983 Pontiac Grand LeMans 1978–1987 Pontiac Grand Prix 1978–1981 Pontiac LeMans	Quantity: 1 Submodel: Base Application notes: LT Swap
1980–1981 Buick Century 1979–1980 Chevrolet Malibu	Quantity: 1 Submodel: Estate Application notes: LS Swap
1982–1983 Buick Regal	Quantity: 1 Submodel: Estate Wagon Application notes: LS Swap
1982–1983 Buick Regal	Quantity: 1 Submodel: Estate Wagon Application notes: LT Swap
1982 Buick Regal	Quantity: 1 Submodel: Limited Turbo Application notes: LS Swap
1982 Buick Regal	Quantity: 1 Submodel: Limited Turbo Application notes: LT Swap
1983–1986 Buick Regal	Quantity: 1 Submodel: T-Type Application notes: LS Swap
1983–1986 Buick Regal	Quantity: 1 Submodel: T-Type Application notes: LT Swap
1984–1987 Buick Regal	Quantity: 1 Submodel: Grand National Application notes: LT Swap
1984–1987 Buick Regal	Quantity: 1 Submodel: Grand National Application notes: LS Swap
1987 Buick Regal	Quantity: 1 Submodel: GNX Application notes: LS Swap
1987 Buick Regal	Quantity: 1 Submodel: GNX Application notes: LT Swap
1978–1987 Chevrolet El Camino 1983–1988 Chevrolet Monte Carlo	Quantity: 1 Submodel: SS Application notes: LT Swap
1978–1987 Chevrolet El Camino 1983–1988 Chevrolet Monte Carlo	Quantity: 1 Submodel: SS Application notes: LS Swap
1978, 1981–1986 Chevrolet El Camino 1981 GMC Caballero	Quantity: 1 Submodel: Conquista Application notes: LT Swap
1978, 1981–1986 Chevrolet El Camino 1981 GMC Caballero	Quantity: 1 Submodel: Conquista Application notes: LS Swap
1979–1981 Chevrolet El Camino 1981 GMC Caballero	Quantity: 1 Submodel: Royal Knight Application notes: LS Swap
1979–1981 Chevrolet El Camino 1981 GMC Caballero	Quantity: 1 Submodel: Royal Knight Application notes: LT Swap
1978–1983 Chevrolet Malibu 1988 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: Classic Application notes: LS Swap
1978–1983 Chevrolet Malibu 1988 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: Classic Application notes: LT Swap
1978–1981 Chevrolet Malibu	Quantity: 1 Submodel: Classic Landau Application notes: LS Swap
1978–1981 Chevrolet Malibu	Quantity: 1 Submodel: Classic Landau Application notes: LT Swap
1978–1980 Chevrolet Malibu	Quantity: 1 Submodel: Classic Estate Application notes: LS Swap
1978–1980 Chevrolet Malibu	Quantity: 1 Submodel: Classic Estate Application notes: LT Swap
1979–1980 Chevrolet Malibu	Quantity: 1 Submodel: Classic Sport Application notes: LS Swap
1979–1980 Chevrolet Malibu	Quantity: 1 Submodel: Classic Sport Application notes: LT Swap
1979 Chevrolet Malibu	Quantity: 1 Submodel: Police Application notes: LT Swap
1979 Chevrolet Malibu	Quantity: 1 Submodel: Police Application notes: LS Swap
1979 Chevrolet Malibu 1978–1981 Chevrolet Monte Carlo	Quantity: 1 Submodel: Landau Application notes: LT Swap
1979 Chevrolet Malibu 1978–1981 Chevrolet Monte Carlo	Quantity: 1 Submodel: Landau Application notes: LS Swap
1983 Chevrolet Monte Carlo	Quantity: 1 Submodel: CL Application notes: LT Swap
1983 Chevrolet Monte Carlo	Quantity: 1 Submodel: CL Application notes: LS Swap
1986–1988 Chevrolet Monte Carlo 1980–1981 Oldsmobile Cutlass 1981, 1985 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: LS Application notes: LS Swap
1986–1988 Chevrolet Monte Carlo 1980–1981 Oldsmobile Cutlass 1981, 1985 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: LS Application notes: LT Swap
1978–1987 GMC Caballero	Quantity: 1 Submodel: Diablo Application notes: LS Swap
1978–1987 GMC Caballero	Quantity: 1 Submodel: Diablo Application notes: LT Swap
1978–1980 GMC Caballero	Quantity: 1 Submodel: Laredo Application notes: LS Swap
1978–1980 GMC Caballero	Quantity: 1 Submodel: Laredo Application notes: LT Swap
1981–1986 GMC Caballero	Quantity: 1 Submodel: Amarillo Application notes: LS Swap
1981–1986 GMC Caballero	Quantity: 1 Submodel: Amarillo Application notes: LT Swap
1983–1984 Oldsmobile Cutlass Calais 1979 Oldsmobile Cutlass Salon	Quantity: 1 Submodel: Hurst Application notes: LS Swap
1983–1984 Oldsmobile Cutlass Calais 1979 Oldsmobile Cutlass Salon	Quantity: 1 Submodel: Hurst Application notes: LT Swap
1978–1979 Oldsmobile Cutlass	Quantity: 1 Submodel: Vista Cruiser Application notes: LS Swap
1978–1979 Oldsmobile Cutlass	Quantity: 1 Submodel: Vista Cruiser Application notes: LT Swap
1979 Oldsmobile Cutlass	Quantity: 1 Submodel: Vista Cruiser Brougham Application notes: LS Swap
1979 Oldsmobile Cutlass	Quantity: 1 Submodel: Vista Cruiser Brougham Application notes: LT Swap
1980–1981 Oldsmobile Cutlass 1978–1980 Oldsmobile Cutlass Salon 1980–1981 Oldsmobile Cutlass Cruiser 1978–1987 Oldsmobile Cutlass Supreme 1982–1986 Pontiac Bonneville 1981–1987 Pontiac Grand Prix	Quantity: 1 Submodel: Brougham Application notes: LT Swap
1980–1981 Oldsmobile Cutlass 1978–1980 Oldsmobile Cutlass Salon 1980–1981 Oldsmobile Cutlass Cruiser 1978–1987 Oldsmobile Cutlass Supreme 1982–1986 Pontiac Bonneville 1981–1987 Pontiac Grand Prix	Quantity: 1 Submodel: Brougham Application notes: LS Swap
1981 Oldsmobile Cutlass	Quantity: 1 Submodel: Supreme Application notes: LT Swap
1981 Oldsmobile Cutlass	Quantity: 1 Submodel: Supreme Application notes: LS Swap
1985–1987 Oldsmobile Cutlass	Quantity: 1 Submodel: Salon Application notes: LT Swap
1985–1987 Oldsmobile Cutlass	Quantity: 1 Submodel: Salon Application notes: LS Swap
1987 Oldsmobile Cutlass	Quantity: 1 Submodel: Eurosport Application notes: LS Swap
1987 Oldsmobile Cutlass	Quantity: 1 Submodel: Lujo Application notes: LS Swap
1987 Oldsmobile Cutlass	Quantity: 1 Submodel: Eurosport Application notes: LT Swap
1987 Oldsmobile Cutlass	Quantity: 1 Submodel: Lujo Application notes: LT Swap
1978–1979, 1985–1986 Oldsmobile Cutlass Salon 1987 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: 442 Application notes: LS Swap
1978–1979, 1985–1986 Oldsmobile Cutlass Salon 1987 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: 442 Application notes: LT Swap
1988 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: Classic Brougham Application notes: LS Swap
1988 Oldsmobile Cutlass Supreme	Quantity: 1 Submodel: Classic Brougham Application notes: LT Swap
1984–1986 Pontiac Bonneville 1978–1981 Pontiac Grand LeMans 1984–1987 Pontiac Grand Prix	Quantity: 1 Submodel: LE Application notes: LS Swap
1984–1986 Pontiac Bonneville 1978–1981 Pontiac Grand LeMans 1984–1987 Pontiac Grand Prix	Quantity: 1 Submodel: LE Application notes: LT Swap
1978–1981 Pontiac Grand LeMans 1978–1981 Pontiac LeMans	Quantity: 1 Submodel: Safari Application notes: LS Swap
1978–1981 Pontiac Grand LeMans 1978–1981 Pontiac LeMans	Quantity: 1 Submodel: Safari Application notes: LT Swap
1978, 1981 Pontiac Grand LeMans	Quantity: 1 Submodel: SA Application notes: LT Swap
1978, 1981 Pontiac Grand LeMans	Quantity: 1 Submodel: SA Application notes: LS Swap
1982–1983 Pontiac Grand LeMans	Quantity: 1 Submodel: BR Application notes: LT Swap
1982–1983 Pontiac Grand LeMans	Quantity: 1 Submodel: BR Application notes: LS Swap
1978–1983 Pontiac Grand Prix	Quantity: 1 Submodel: LJ Application notes: LT Swap
1978–1983 Pontiac Grand Prix	Quantity: 1 Submodel: LJ Application notes: LS Swap
1978–1980 Pontiac Grand Prix	Quantity: 1 Submodel: SJ Application notes: LT Swap
1978–1980 Pontiac Grand Prix	Quantity: 1 Submodel: SJ Application notes: LS Swap