Difficult, but I've come up with this:
-----------------Bailey
Carey--McGrath--Buchan--Shaw
-----------Matic--Robson
-----------------Bruno
Coppell--Stan Pearson--Rowley
Obviously not seen the likes of Carey, Rowley or Pearson. Buchan or Coppell either for that matter although I've seen footage. I'm mostly going off reputations with those 5.
I'm not Shaw's biggest fan, but I don't remember being enthused by Albiston either when I was a kid. I only saw the tail end of his United career though and I was rather young. The rest of the back 4 picks itself.
Robson is a must of course.
Coppell is more of a 4-4-2 winger, but I was struggling for options on the left in that formation so fudged him into a 4-3-3. Despite him not exactly being popular, Rashford becomes a big shout for the left (if he counts), but I've gone with Rowley. Could play as a central striker or wide left so I'm sure he can play there in a modern 4-3-3.
Wanted to put Hughes in, one of my all-time favourite players. I decided to go for someone a little more prolific in Stan Pearson to make up for Coppell's relative lack of goals in the end although there's not much in it goals per game-wise between him and Sparky. Besides, Hughes could drop deep as well as leading the line, and if he does I don't want him dropping into the space that an AM would already be in, could get in each other's way. Hughes would suit a 4-4-2 more.
Now I need an AM and DM. Thought about Mcilroy for AM but stuck Bruno in there. He's another who isn't exactly popular or a favourite of mine but he gets the nod.
Just need a DM now to try and add some balance to midfield. Past his best when he came here, but I did like Matic.
Nice little blend of 3 pre -Busby signings, 5 in-betweeners, 3 post-Ferguson.