Carl Hansen competed in GT Racing New Zealand (GTRNZ) for several seasons in his special TVR Tuscan. The car raced in their GT1 class and was powered by a 5.8 L (5766 cc) Rover V8 featuring Wildcat Engineering stage 2 heads and forged internals connected to a Hollinger five-speed transmission. Carl swapped the engine and transmission for a built 401 ci (6.57 L) Ford V8 and a Hollinger six-speed transmission in 2011-2012. The engine is reported to make 800+ horsepower on a MoTeC ECU and 108 mm throttle body. In 2015 the car was fitted with an aero kit from Kinetic Simulation.
Source: Hansen Products and Kinetic Simulation via Innovative, Banned, and Unique Racing Cars FB group