'Course it helps if it fits. There is NO indication that the 13033 will fit a Sport Trac. If you buy it and it fits that'll be some good info to share.
From the site linked above.
Model:
13033
Class:
Class III
GTW:
5000
TW:
500
WDGTW:
6000
WDTW:
600
Drill:
No
Install Time:
30 Min
Hitch Ball Hole:
1"
Rec. Tube Size:
2 "
Finish:
Gloss Black
This Hitch Fits The Following Vehicles
1991-2001 Ford Explorer 4-Door, Except w/Oversized Spare Tire
1991-2001 Ford Explorer Sport 2-Door, Except w/Oversized Spare Tire
1991-1994 Mazda Navajo SUV
1996-2001 Mercury Mountaineer All, Except w/ Oversized spare tire