Jason and John White have combined to seven Targa Tasmania titles, one behind the record set by Jim Richards and Barry Oliver.

The Dodge Viper will switch from wear sensitive and extremely low profile 19-inch tyres on the front to a more durable 18-inch rim and tyre combination.

"We have a different tyre package on the front which will hopefully stop us whingeing about our tyre wear," White said.

"The only option we had before was the OEM tyre that came on the car.

"So now it has eased our mind as far as the front of the car goes but the rear is still as big an issue as it has ever been.

"There is a massive tyre on the rear so there is no-one that makes a tyre that would be compatible for it."

The changes come as the Whites eye the record of Richards and Oliver.

"That (eight wins) is the starting point for us. John has always said that he would retire at 10 (wins)," White declared.

"We've had a couple of failed attempts in the last five or six years.

"We've been in the lead of more Targas than we've won and have lost them for one reason or another.

"An eighth win is something we are really, really desperate to get on the board. The eighth win would just be a stepping stone to 10.

"But you can be too confident about a Targa attempt. We are well aware of the battles ahead to actually get to the finish line and win it. Turning up with the fastest car is a very secondary thing.

"This year is very important to us and it certainly has got our attention and we are not heading into it lightly."

Former Targa Tasmania winner and 2020 Targa Great Barrier Reef champion Tony Quinn and Kate Catford are in fine form and return as top chances in their 2018 Nissan GT-R.

The 29th edition of Targa Tasmania will kick off from the Launceston Silverdome to the first stage, High Plains, on Monday with the event finishing after 37 stages and 618km of competitive distance in Hobart on Saturday.