i would think your weight on the z was high and the trailer weight would be low? long drive, is the T100 a V-6? the owners manual will tell you all ya need to know and if ya take it slow and easy ya should be ok but i would think it would tax a V6?
1995 Toyota T100 Review, Prices, Photos: New Car Test Drive close call!! what year model and did ya have
the Z Car Home Page says the US model only weighs less than 2300 lbs!

unless ya filled with a V8 you should be ok!