Yup, and Ford will always sound the same, no matter how old he is. He could voice the character no problem, with no issues doing stunts, or unbelelievably complicated set pieces. This could be used for almost any era.... from what I hear, there was an entire season of unfilmed Young Indy adventures.
Even if they aren't able to get Ford, they could get whoever voiced him in the Indy games (such as Emperor's Tomb) to do it, as he did a fairly good job at playing a convincing Indy.