From my dim and distant memory, I seem to remember, just after Busby retired, a spoof (or it may have been genuine!) application form doing the rounds for the position of manager at Old Toilet. It went something like this:
Name: Religion:
Date of Birth: Religion:
Experience: Religion:
Where Christened: Religion:
Are You Catholic: Yes/No
If No, do not proceed.
I also remember hopping into their ground on my left foot, as did most other blues at the time.
In the late 60s, I went there when we were at Sunderland away in midweek, and they played Newcastle at home ( paid for by one of my bosses) - I couldn't get time off to go to our game.
Remember saying to my colleague (an Oldham fan, also paid for by the boss) "bloody hell, there's a lot of Newcastle fans here - oh, sorry Father!"
Yes, it was well known they were the "Catholic" club, hence their strong ties with Celtic.