Unless I'm wrong the laredos never came with a hemi. If you still wanna check the easiest way is to look on the back of the jeep. Do you see a 5.7l badge? If so its a hemi. If not its likely a 4.7l, which is not a hemi. It is also possible, however unlikely, the last owner took the badge off so look under the hood it will say what it is right on the engine cover. Also if the tb is up front its a 5.7l hemi, if its in the back its a 4.7l. Hope this helps.
It's almost definitely a 4.7, if you know it's a v8. If you pop the hood snap a pic of the airbox and put it up here I can tell you for sure. Laredos for that year never came with a hemi.