An unbeaten half-century by Shaun Marsh put Australia in a strong position on Monday, setting India a near-record task if they are to win the third cricket test. Marsh produced one of his finest knocks for his country with 62 to steer Australia to 261 for seven, giving the hosts an overall lead of 326 runs heading into the final day. The Indians will have to defy history at the Melbourne Cricket Ground, where they have not won for 33 years, to keep the series alive to next week's fourth and final test in Sydney. Shaun Marsh is batting fantastic and we saw what Ryan Harris did in the first innings , so hopefully he can produce something similar to that Australia opening batsman David Warner The highest successful run chase in the fourth innings at the MCG remains 332 for seven by England against Australia in 1928. Australia have to decide whether to declare overnight or bat on with a total of 96 overs to be bowled on the fifth day, but opener David Warner believes more runs are needed. "I think we need a few more runs than we've got at the moment. Shaun Marsh is batting fantastic and we saw what Ryan Harris did in the first innings , so hopefully he can produce something similar to that and I think we'll assess it after we're all out," he said. Marsh's fighting innings tilted the test Australia's way after India reduced the home side to 176 for five, claiming the key wickets of Steve Smith and Chris Rogers. "Any score on the final day is going to be tricky," Indian spinner Ravi Ashwin said. "It's going to be hard work, but we're up for it. We're here to win games of cricket, so we'll be positive and try to see where we can go."