hello-
i'm about to do an engine swap myself, but with a turbo engine. i would look into which fuel injection system your 91 has. if it has the 2.4 system, you will need to use the engine coolant temp sensor from your 91. if all sensors in your 91 work, i would recommend just using those. your AMM will make up for the slight difference in fuel delivery.
while you have the engine out, you should replace the rear main seal and if the timing belt is getting up in age, that too. these are much easier to replace while the engine is out of the car.
get a can of engine degreaser, and if you're feeling particularly motivated, repaint the engine (so it looks cool!) it's good to have a clean engine because it makes it easier to track down any leaks you may encounter later on. good luck.