I also thought it was Andy Brockbank (Brocklebank?) but that it was the Halifax game, not York. Stand to be corrected though.
We were in the Scratchers and even from there (opposite side of the pitch) we immediately said it hit the side stanchion. But weirdly the ref and lino signalled goal.
Edit to add: my highest was the 5-4 game with Brentford like many others above.
There must be two of these goals then. The Brockbank shot was from not far inside of York half, attacking the south, the ball hit the outside of the net on the scratching shed side and rebounded straight back.
In my mind the Halifax game was most memorable for Dave Bamber outjumping Grenville Mellington at the far post to nod it into an empty net.