Umm just a thought... but the stock overall diameter of the tires is 24" the overall diameter of the tires you want it 25.7" approx. So your acceleration will be affected... also as far as i know the widest wheel that fit the celica with out rubbing is and 18x8.
8,5x19 ET30 with 235/35 works great with stock fenders. But that's about the limit aswell. When I've got full lock -- if the tyres pick up any gravel, the gravel scrapes the inside of the fender
so there's not a LOT of room, but it works. and that's with a (ca) 2,3 inch drop up front, and 2,7 rear (if the cm to inches converter isn't lying to me...)