The lefthanded-hitting Cuellar, with a .089 batting average and 7 RBIs to show for his season's efforts, then pulled a Perry pitch toward foul territory in right field.
By the time he arrived at first base, the wind had worked its devilry against the home forces, depositing the ball over the fence in fair territory, and giving Cuellar a grand slam.
Then Don Buford cuffed Perry for a knock-out home run and reliever Bill Zepp yielded a left-field round-tripper to southpaw-swinging Boog Powell to complete the seven-run outburst.
Dave McNally received the second-game assignment and once again delivered another great pitching performance en route to another O's victory.
Stan Williams, following Tom Hall and Bill Zepp to the mound, blanked Baltimore the next three frames and Ron Perranoski zeroed the visitors in the eighth before the East Division champs soon erupted for another big rally of runs.
The big righthander, just 10 days short of his 25th birthday and two years removed from an arm ailment that threatened his career, was razor sharp, scattering seven hits.
A 20-game winner with a 2.71 ERA in regular season, Palmer set a personal career high of 12 strikeouts and issued only three walks.
He also laced a double and figured prominently in the second-inning Oriole run when his blooper to short center field was misplayed for a two-base error.
By that time the trend of the game had been established and three successors, while more effective, were helpless to change the outcome, the Birds cruising to an easy victory and the AL pennant.
For all of their promising talent (having won the pennant in 1965 to go with two further playoff appearances, which came despite having seen three managers fired in three years), this was the second straight loss in the ALCS for the Twins.