Andrew Leal writes…
I know you're getting tired of it by now, but turns out Mike Tiefenbacher is wrong. The actual voice of Scrooge on that album was not Alan Young (and Young himself has always mentioned the Christmas Carol album as being his first time in the role, and all sources confirm it). Scrooge on that album was played by the late Dallas McKennon (sourced by Tim Hollis and Greg Ehrbar's authoritative book Mouse Tracks: The Story of Walt Disney Records, as well as copies of album snippets that have surfaced online; the album itself may or may not actually include voice credits on the jacket or label, I don't have a copy to check). Then Bill Thompson played Scrooge in the 1967 featurette Scrooge McDuck and Money, and then Alan Young.
You're probably right but I'm going to wait until I hear from Mr. Hollis or Mr. Ehrbar, both of whom follow this site. And now that I think about it, Alan Young was starring in Mister Ed at the time that record came out so he probably didn't have a lot of time to go make records for Disney.