You can do anything with enough time and money. The best swap for the Celica platform is another Celica engine. You would be altering to many other components to make it worth the coin.
Yes. Well, double check on the year difference, but I have a 2002 Celica GT and put a 2003 Corolla engine in it. As mine is 5 speed, the Corolla engine had to be manual as well, but it worked perfectly. Corolla and Celica r very compatible with many different parts. Hope this helped
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