can a newer model be used

Since we got computers to control everything, changing engines ar even engine years is difficult at best. Computers are set to recognize everything and if something doesn't match, it won't work. So find an engine specific for your car, the exact same year.

The answer is no, newer engines will have to be modified to accept the old electronics and some newer engines do not have places for those old components to fit. I have seen newer engines in older vehicles but the entire powertrain, wiring and electronics had to be installed in the old vehicle. Lots of money involved in a job like that.

Thank you. I am finding everything about this car to be very difficult

Technology is making it very difficult to anything that deviates from the stock configuration.