A thumping 6-1 aggregate win after Wednesday's second leg put United into a third European Cup final in four years and Ferguson need not have lost sleep after all over his weakened team selection versus a German side punching above their weight.
United will face Barca at Wembley on May 28 in a repeat of the 2009 final which the Spaniards won 2-0.
Although Ferguson is not frightened of the favourites he will welcome any tips from Real Madrid's boss Mourinho whose side beat the Catalans in the King's Cup final.
"I speak to him quite a lot. I spoke to him last week," Ferguson told a news conference when asked about Mourinho, an old sparring partner of the Scot in his Chelsea days.
"We will depend on our own knowledge of Barcelona, it's not like we've never seen them before. (But) you always take information from him (Mourinho) because he's always helpful like that."
Mourinho's Real were Barca's European semi-final victims on Tuesday but success in the domestic cup proves that the hot favourites can be beaten.
"I don't think we should be going there lacking in confidence... We can't be frightened out of our skins," Ferguson said.
"Our job is to find a solution when playing against them."
"We were favourites last time (2009)," said Ferguson. "We will be a little bit more experienced but they are at their peak in terms of ability.
"That experience has shown in terms of our away form in Europe. It should be a really good final."
United's defeat by Arsenal at the weekend has opened up the title race as Chelsea closed the gap to three points and the champions can go top on goal difference with a win over United.
"It was not an easy decision to make, one I wrestled with for a few days... the Arsenal result forced the situation," Ferguson said of his team selection.
"So, a fresh team on Sunday," he said. "We'll go for it."
