Engine Swap on 97 E 250

97 E 250 has a 4.2L engine in it that has a knock. Have found a 4.2L engine in a 95 Thunderbird (30,000 miles supposedly). Will the engine out of thunderbird swap without any problems or is there mods to be done. Would the PCM and ECM be compatitable or would we need the modules out of the Thunderbird??
Thanks for all advice