Ken Block reveals Mustang-based Hoonicorn RTR Gymkhana machine

Ken Block swaps Fiesta for Mustang with his latest gymkhana weapon.

Size doesn't matter, they say. Tell that to Ken Block.

The US stunt/racing driver/entrepreneur has upgraded his Ford Fiesta with its relatively puny 1.8-litre turbocharged four-cylinder engine to a 1965 Ford Mustang sporting a 6.7-litre V8.

While it might take its design cues from the iconic original Mustang that celebrates its 50th birthday this year, the only original components you'll find on Block's version are the head and tail lights, as well as the pony badge on the front. The rest - much like the recent Project Sandman - is 100 per cent modern race car.

This is hands-down the best Gymkhana car I’ve had yet

The naturally-aspirated V8 engine produces 630kW and 975Nm which is put to the road by a bespoke 6-speed sequential transmission that distributes the power to all four wheels. Ford only ever put the power to the back two.

The suspension is custom-built, and the 18" wheels are shod with Pirelli tyres in a compound made specifically for Block. Not even a Formula One team gets that sort of attention from the Italian rubber company.

Motorsport connections don't stop there as Block says the design of the car has also been influenced by current generation WRC and DTM cars, bringing together the classic Mustang silhouette with all the performance benefits of modern aerodynamics and carbon fibre construction.

"The attention to detail with the fabrication and bodywork blows my mind," Block said.

"This is hands-down the best Gymkhana car I’ve had yet."

The car is currently on display at the SEMA motor show in Las Vegas, but those unable to get there in person will see it in Block's upcoming ‘Gymkhana SEVEN’ video.

Block's previous gymkhana efforts have seen him display immense car control and driving skill in a variety of different locations, including usually busy streets of downtown San Francisco.

More recently, Block has been getting around the ski slopes of Canada in a Ford F-150 RaptorTRAX. It can also do burnouts, despite its lack of wheels.