Bit of an insight to your question;
LS2 – 6.0lt – 364ci
The LS2 400 bhp (300 kW)@6000rpm and 400 lbf·ft (540 N·m)@4400rpm from a slightly larger displacement of 5,967 cc (5.967 L; 364.1 cu in). It is similar to the high-performance LS6, but with improved torque throughout the rpm range. The LS2 uses the “243″ casting heads used on the LS6 (although without the sodium filled valves), a smaller camshaft, and an additional 18 cubic inches. The compression of the LS2 was also raised to 10.9:1 compared to the LS1s 10.25:1 and the LS6s 10.5:1. The LS2s in the E-series HSVs are modified in Australia to produce 412 bhp (307 kW) and 412 lbf·ft (559 N·m).
Applications:
2005-2006 Holden Special Vehicles Clubsport (VZ Series)
2005-2006 Holden Special Vehicles Senator (VZ Series)
2005-2006 Holden Special Vehicles Coupé4 AWD (VZ Series)
2005-2006 Holden Special Vehicles Avalanche XUV AWD (VZ Series)
2005-2006 Holden Special Vehicles SV6000 (VZ Series)
2005-2006 Holden Special Vehicles Maloo (VZ Series)
2005-2006 Holden Special Vehicles Coupé GTO (VZ Series)
2005-2008 Holden Special Vehicles Clubsport R8 (VZ Series, VE Series)
2005-2008 Holden Special Vehicles Grange (VZ Series, VE Series)
2005-2008 Holden Special Vehicles Maloo R8 (VZ Series, VE Series)
L76 – 6.0lt – 364ci
L76 was originally Holden’s version of the 5,967 cc (5.967 L; 364.1 cu in) Generation IV engine. While displacement on demand technology was disabled on Holdens, this feature is enabled on the 2009 model Holdens with AFM, but only on models fitted with the 6L80 Automatic Transmission. The engine also meets Euro III emissions requirements. Output is 348 bhp (260 kW)@5600rpm and 376 lbf·ft (510 N·m)@4400rpm for the Holden variant.
Applications:
2006 Holden VZ Late Models
2006 Holden WL Statesman/Caprice – Those built from February 2006 until September 2006 until the release of the WM series.
2009 Holden VE Commodore
2009 Holden WM Statesman/Caprice
2009 Holden VE Ute
L98 – 6.0lt – 364ci
The L98 is a slightly modified version of the L76. Since Holden did not use the displacement on demand technology of the L76, some redundant hardware was removed to form the L98. Power increased to 362 bhp (270 kW)@5700rpm and 391 lbf·ft (530 N·m)@4400rpm. As of February 2009 Holden have used AFM in the L76 block which has been available in all automatic V8s
Applications:
2006 (MY06) Holden VZ SS Thunder Ute
2006-2009 Holden VE Commodore
2006-2009 Holden WM Statesman/Caprice