'Bomber' Brown had added to his legend in the Black Country, but in the red of Walsall on this occasion, rather than the black and white of West Brom.
His match-winner stunned English heavyweights Arsenal and delivered one of the greatest nights in the Saddlers' history.
Walsall were buoyed by a 10-match unbeaten run in the league heading to North London, but nobody expected them to produce a giant killing of such iconic proportions.
Over 2,000 made the journey from WS1 after wins over Barnsley and Shrewsbury Town in the earlier rounds had set-up a lucrative fourth round tie in the League Cup.
The Saddlers' had prepared with a kickabout on the pot-holed car park out the front of Fellows Park and named a team that cost less than Arsenal centre-forward Charlie Nicholas earned from his sponsors - according to the Daily Express.
Richard O'Kelly, David Preece, Craig Shakespeare and Peter Hart celebrate victory at full-time.
Richard O'Kelly, David Preece, Craig Shakespeare and Peter Hart celebrate victory at full-time.
A young midfield trio of David Preece and Craig Shakespeare, both 20 at the time, and Gary Childs, who was 19, produced an excellent display to set the tone.
"This was certainly one of the best displays by a Walsall side in the 12 years I have been with the club," Walsall's longest serving player Brian Caswell reflected at full-time.
Yet despite asserting their dominance on the opening exchanges, Walsall fell behind just past the half-hour mark when Stewart Robson broke the deadlock.
It was a neatly work move from the hosts. Nicholas picked the ball up on the right and threaded a precise pass in-field to David O'Leary. His through ball was seized upon by Robson, who powered his finish underneath Mick Kearns.
It would not prove to be a crumbling point though. Instead, the goal only served as ammunition to spur the Saddlers on...
Mark Rees levelled for Walsall in the 61st-minute when he controlled a low delivery from Brown and slammed his finish beyond the reach of Pat Jennings.
Peter Hart raises his arms to celebrate with the 2,000 travelling fans.
Peter Hart raises his arms to celebrate with the 2,000 travelling fans.
Jennings had thwarted Richard O'Kelly just moments prior and continued to frustrate Walsall with a string of outstanding saves.
"If it had not been for Pat then we could have had five or six goals," Walsall's legendary player-manager Alan Buckley quipped afterwards.
The Saddlers could not be tamed for long. O'Leary looped a header on to the crossbar and Childs came within a whisker of the winner when he drilled a low effort from distance inches wide of Jennings' right-hand post.
Arsenal were on the ropes and Walsall delivered the knockout blow six minutes from time.
Preece scooped a teasing cross to the near post, which was completely miscued by Gunners defender Chris Whyte. Brown was watching like a hawk and pounced to smash home on the half-volley from just four yards out.
The final minutes ticked by as Walsall fans faced an agonising wait. Then Mick Kearns launched the ball upfield and the whistle sounded for the final time: history had been made.
A handful of spectators raced on to the pitch, where Kearns danced gleefully and Rees pumped his arms profusely on his victorious charge towards the travelling end.
Possibly Walsall's most famous win prior to that success also came against Arsenal when they conquered Herbert Chapman's outfit in the FA Cup back in 1933.
But many began placing that night at Highbury above any, including Buckley himself.
"It's the greatest night the club has ever had," he declared.
"It's not just the result - it was the incredible football we played. All of the lads were magnificent."
One fan had witnessed both triumphs of the Saddlers' 50-year double over the Gunners.
Walsall also famously beaten Arsenal 2-0 at Fellows Park in the FA Cup in 1933.
Walsall also famously beaten Arsenal 2-0 at Fellows Park in the FA Cup in 1933.
"The game was sheer magic, absolutely fantastic," James Beasant of Mersey Road, Walsall, told a publication at the time.
"Ally Brown was the schemer and 'Minnie' Preece was a real tornado. It was one of the most memorable moments of my life."
The national media showered Walsall with praise the following morning too.
"Arsenal were beaten on merit. They were outplayed from the first whistle to the last," assessed Colin Bateman of the London Evening Standard.
Amid the disappointment and humiliation, Jennings demonstrated his sportsmanship by shaking every Walsall player by the hand as they exited the pitch.
Even Arsenal manager Terry Neill did not want to underplay the damage that Walsall had just managed to inflict on his side.
"Let's not forget the way Walsall played - they were good, very good. Walsall deserved every moment of their success," Neil conceded.
Walsall would go on to beat Rotherham United in the quarter-final before meeting Liverpool in another memorable tie in the last four...