96 cav engine swap

hello im a little new to this forum so please bear with me. i have a 96 cehevy cavalier z-24. i purchased it from a neighbor and new that it had a cooling problem. i changed out the radiator fan, as it wasnt working continually blowing fuses. it ran fine for a day and then on a medium length trip ( about 45 miles or so) it overheated on the highway before i could get off the highway the temperature guage had pegged off scale high. i believe that i have blown the head gasket.
now for the question... i have the opportunity to get a 2000 2.4l twin cam engine for the car for a reasonable price. my question is this i have already been advised by the local motor head that i would be better off swapping out engines as mine has 127,000 miles on it. he also said that he wasnt sure that the engine computer systems would be compatible i would like to know if anyone out there can offer advice on this subject before i spend the money to buy the other engine any help that you can give would be appreciated
thanks

The intakes are usually the problem when swapping these engines. If these two engines are the same block then I would suggest that you change basically everything on the outside of the engine to make sure it will fit. Good luck!!!!!!!!!!!!!