York made a half-time substitution with Hobson replacing Hocking in a straight central defensive switch.
The impressive Fettis pulled off a great diving save on 48 minutes when he diverted Williams' 20-yard drive around the post after the midfielder had been supplied by Bennett. Ian Foster
But a minute later debut-making centre-back Sall made himself an instant hero with fans, heading home Williams' corner from close range.
Then Harriers made it three on 50 minutes when Ian Foster ran in from the left and with defenders still ahead of him curled a fine right footer just inside Fettis' post.
Broughton volleyed a good chance over the bar from inside the area on 59 minutes after the hard-running Bennett's pass deflected high into the air.
Brock tipped a great right-wing effort from Proctor onto his bar on the hour when it looked like the returning keeper had misjudged the flight of the ball.
But Harriers seemingly confirmed a welcome three points on 63 minutes when Sall's chipped pass sent Larkin through the middle.
The striker could not quite get a shot in at goal but the ball fell nicely for strike partner Broughton to tap in from an acute angle.
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