Alastair Cook's side travel to the WACCA, which is renowned for regularly having quick and bouncy pitches, next week trailing 2-0 in the series, having fallen to heavy defeats inspired by Australia paceman Mitchell Johnson.
England are expected to make changes to try and improve results, and Willis has called on England to fight fire with fire and select Finn, the quickest bowler in their 16-man travelling party, while suggesting that Monty Panesar should be preferred to Graeme Swann as the spin option.
He told Sky Sports News: "I'm not in favour of throwing guys who haven't played Test cricket straight into an Ashes Test, so I'd leave out Boyd Rankin and go with Steven Finn. Finn is capable of bowling the ball at 90mph. Admittedly, he goes for a lot of runs but England are going to need 20 wickets to get back in this series.
"It may be a toss-up between two spinners because Monty Panesar out-bowled Graeme Swann in Adelaide and against this Australian pace attack, Swann has got nothing to offer with the bat.
"Never underestimate Alastair Cook and Andy Flower. They're a very resilient pair and if any two can inspire this bunch, it's those two. People will say it's about time England did perform and win a Test in Perth. The odds are long stacked against them but don't write England off just yet."
Finn has taken 90 Test wickets at an average of 29.40, and has claimed a dismissal approximately every eight overs, which is a superior strike rate to England colleagues James Anderson and Stuart Broad.