97 explorer xlt timing belt problem

So what kinda damage could happen if the timing belt/chain (im not sure what it is yet), im assuming it broke, what kinda damage could it have done to the rest of the motor. Its an XLT 4x4, not sure of the engine, u ford guys tell me, is it an interference motor or not? How much of a pain in the ass is replacing this? Lemme know what u guys think asap

4.0 i beleive sohc and u might need some valves not sure yet