This is going to be a very tough one against Conference South high fliers (http://www.bufc.drfox.org.uk/next.html), but they're all likely to be tough at this stage of the Trophy.
Boston United's record at Dartford isn't very good either. Here are all the games between the two sides:
Sat 12th Dec 1959 A S Dartford L 0 1
Sat 30th Apr 1960 H S DARTFORD 2450 W 2 1
Wed 19th Apr 1961 A S Dartford 770 L 1 3
Sat 29th Apr 1961 H S DARTFORD 907 W 2 1
Tue 12th Nov 1974 A I Dartford L 1 3
Mon 9th Dec 1974 H I DARTFORD 1150 D 2 2
Sat 27th Feb 1982 H A DARTFORD 1059 W 3 2
Sun 28th Mar 1982 A A Dartford L 1 2
Sat 20th Oct 1984 H G DARTFORD 1157 W 2 0
Sat 1st Dec 1984 A G Dartford 696 D 1 1
Sat 31st Aug 1985 A G Dartford 439 W 1 0
Sat 11th Jan 1986 H G DARTFORD 1226 W 3 0
Sat 27th Oct 1990 A F Dartford 805 D 1 1
Wed 31st Oct 1990 H F DARTFORD 1774 W 2 1
Also the way Boston United have been playing in recent weeks doesn't give them much hope, but I think they might just yet pull off a surprise result and get a draw. So I'm going for:
Dartford 1-1 Boston United (1168)