Below is how both teams reported on the game in the programmes from their next matches. Click the images to enlarge.
16/03/1974 Burnley 3 Everton 1
Burnley manager Jimmy Adamson was clearly upset at the suggestion that his side were lucky to beat Wrexham. "Frankly we are rather fed up of the sour grapes attitude" he wrote, in criticism of Wrexham's players and manager.
Three weeks after the Wrexham game, Burnley were beaten 2-0 by Newcastle United in the semi-final at Hillsborough.
The programme contained 20 pages and measured 17.5cm x 23.5cm.
16/03/1974 Wrexham 2 Halifax Town 1
Contrary to Jimmy Adamson's view, the Wrexham programme described the Burnley result as "one of the greatest Cup injustices of all time". There was also a less than flattering summary of the Burnley side, observing that they "never looked anything like League Championship contenders".
The two articles are from the Halifax programme. The photo is taken from the Charlton game played on March 30th.