According to my 1998 T100 Owner's Manual the vehicle conforms to SAE J1819. Here is a link that may be of interest:
http://www.nhtsa.dot.gov/cars/rules/...FinalRule.html
The manual also states that 3 types of seats may be used in this truck: Infant Seat, Convertible Seat, and Booster Seat. Of course, install following the instructions provided by the 'seats' manufacturer.
One particular CAUTION was mentioned several times in the manual: "Do not put a
rear-facing child restraint system on the rear seat if the child restraint system interferes with the front seat lock mechanism or with your proper driving position. This can cause severe injury to the child and front passenger in case of sudden braking or a collision. If your driving position is not satisfactory, install the child restraint system at another position."
The Rear Bench Seats in the T100 have three sets of seat belts. You could position the Child Restraint System on any of the three, as long as it does not interfer as stated in the above paragraph.
I hope this helps enable you to make your buying decision.
Best Wishes and Good Luck!