Sportal.co.nz 17.Aug.2013Getty Images
McCaw, 32, has played one club game for Christchurch, two Investec Super Rugby matches off the bench for the Crusaders and a 40-minute trial for the All Blacks against Canterbury since returning from a six-month break from the game.
But the 116-Test veteran says he's feeling refreshed and shrugged off concerns over his lack of match fitness at his pre-match press conference at ANZ Stadium on Friday.
"I'd quite like to go 80 and if that's the case then I'm quite happy to go as long as I can, but you always go into the game expecting that that might be the case," McCaw said.
"I feel mentally in good shape and I've done a lot of training but nothing equates to being out there in a Test match.
"Even coming off Super Rugby it's a different intensity in Test rugby and I've just got to make sure I do the job that I need to do."
The All Blacks boast an impressive 680 Tests caps in their starting side and enter the Bledisloe Cup opener heavy favourites against a Wallabies squad featuring five debutants.
But McCaw is adamant complacency won't be a factor against the Wallabies, who last won the trans-Tasman trophy in 2002.
"The last time we played the Wallabies it was a draw and we were probably pretty lucky to end up with a draw, so that's the memory I've got," he said.
"History doesn't mean anything and we've had to make sure we have a good week of preparation and tomorrow it's about the team that puts the performance together.
"If you go out there expecting it's just going to happen because you've been there before that's when you come unstuck.
"If anything I've learnt over time is as soon as you don't prepare like you should you'll come second whether is individually or a team.
"We've been here before but we've got to make we deliver all the little things that make your job to make the team do well, we've got to make sure we do that and lead that way. "
While much has been made of Ewen McKenzie's appointment as head coach, McCaw is not expecting any dramatic changes to the Wallabies' style following Robbie Deans' departure last month.
"A change of voice will add a bit of zing to them, but they're the same players that we've played against through Super Rugby and before, from our point of view it doesn't change things a whole lot," he said.
"In the last couple of years against the Reds they bring something new can week. I think they're prepared to use the ball if they get the ball on the front foot.
Meanwhile, McCaw expects to see his old sparring partner and back-up flyhalf Quade Cooper on the field late in the game and admits he's been impressed by starting number 10 Matt Toomua's Super Rugby form.
The skipper revealed the All Blacks will attempt to shut down Toomua's time and space and also stressed the importance of limiting code-hopper Israel Folau's impact on the game.
"He's (Folau) obviously a big man, he's got skills under the high ball, but again if we don't give him enough time to show those (skills) hopefully we can limit his impact," he said.