When the 49ers and Cardinals met at Candlestick Park in October, the game's outcome was still in doubt in the third quarter.Arizona had just scored a touchdown to come within two points at 22-20 with about 4½ minutes remaining in the period.That's when the Niners locked up the game. San Francisco used an 18-play, 89-yard touchdown drive that ate up more than 9½ minutes and gave the 49ers a 29-20 lead en route to a 32-20 victory."We grinded some meat," 49ers head coach Jim Harbaugh said after that game. "The game could have gone different ways. Our players really toughed it out when they had to."It became one of the 49ers' most memorable drives of the season, a testament to the offense's ability to run the ball and control the clock. In a victory over the Falcons this past Monday, the 49ers had another significant late-game drive, going 76 yards for a touchdown on six plays – all runs – in a 34-24 victory.So as the 49ers prepare to face the Cardinals in Arizona this Sunday, the 49ers no doubt are ready to grind some meat again, now that left guard Mike Iupati is back and the team's rugged offensive line is again intact.But much has changed since that first...