New from Southern Performance Systems – they now offer 23 different GM LS conversion packages. These are the most complete kits on the market that make LS swaps easy for your classic GM. See more details below.

Official Release:

Southern Performance Systems offers 23 different complete and direct fit LS Conversion Packages for Chevrolet, Buick and Pontiac models. The LS Conversion Packages assist with the installation of a cooling system, fuel delivery system, engine and transmission mounting in the chassis and header installation.

“Years of experience in design and testing have allowed us to become the leader in LS conversions,” said John Tucker, Southern Performance Systems owner. “We offer the most complete and direct fit LS Conversion package on the market.”

All Southern Performance Systems packages include a direct bolt-in, American-made radiator designed exclusively for the LS engines along with two gallons of antifreeze, stainless steel overflow tank and billet radiator cap. For mounting the engine and transmission, all frame mounting brackets, LS engine adapters, nuts and bolts along with urethane motor and transmission mounts to install into the chassis are included. All engine and transmission brackets are powder coated. In most cases, the transmission mounts are adjustable and fit all current GM transmissions. Ceramic coated, full tube headers are provided for additional performance. These headers are designed to work with the engine-transmission mount kits. Southern Performance Systems also offers a direct bolt-in fuel tank with EFI pump built-in and fuel sender to work with specific applications. A fuel line hose system is provided that includes #6 AN braided fuel line, all of the correct #6 fittings and adapters, along with a fuel filter regulator to control fuel pressure.

The following LS Conversion Packages are currently available:

  • Chevelle 1965-72
  • El Camino 1964-72
  • Malibu 1964-69
  • Monte Carlo 1970-72


  • Impala 1965-66 Convertibles
  • Impala/Belair/Biscayne 1961-66


  • Malibu 1978-83
  • Monte Carlo 1978-88


  • Chevy II/Nova 1962-67
  • Nova/Venturea 1968-74
  • Nova 1975-79


  • Belair/210 1955-56
  • Belair/210 1957


  • Coupe/Convertible 1963-74


  • Camaro 1967-81


  • Skylark 1964-72
  • G5 1964-72


  • GTO 1964-72
  • Leman 1964-72
  • Tempest 1964-72


  • Firebird 1967-81


  • Cutlass 1964-72
  • 442 1964-72


  • The most complete and direct fit LS Conversion package on the market
  • Direct bolt-in, American-made radiator
  • All engine and transmission brackets are powder coated