Performax conversions on show

And Ford's F-Series utes, Dodge Ram and Toyotas Tundra could be on the way from this Queensland-based conversion crowd in Gympie, two hours north of Brisbane.

Now 21 years old, and with 70 staff, a new 2500sqm factory and production line, Performax is looking to grow from some 200 vehicles a year to 400-500.

The Chev Silverado, crew cab diesel in LTZ trim is the most popualr of trucks.

Prices for the big Silverado and GMC utes ran from $80,000 through to $115,000, depending on options. Peformax hold 25-30 in stock; special orders could take four to six months.

But while the Australian dollars so strong phones are running hot for American muscle cars, says Performax sales manager Kevin Thoroughgood.

The company's conversions, with moulded plastic dashboards, offer fit and finish as good, if not better, than factory standards on vehicles like the Camaro.

On a big ute there are around 600 changes, right down to new angles for the driver's pedals.

Along with the Gympie outlet, Performax is expanding with licenced dealers across the country, one in New South Wales, one in Tasmania with one about to be confirmed in Western Australia. Sydney and Melbourne are next on the list.