How difficult is it to replace oil pan on 98 Toyota Tacoma 4x4 2.7L 4 cyl?

It's not that difficult, but is time consuming, 4WD makes it more difficult (move time.There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online