Can I turn a Celica GT into a GTS?
Can I take the IRS out of a 1982 Toyota Supra (L-Type) and put it into a 1984 Celica GT to turn it into a GTS?
I would check www.toyotanation.com, those guys are really knowledgeable and will be able to tell you definitely if it can be done and how to do it.
Search Toyota Celica Questions
Toyota Celica Experts