I was considering doing this on my RA60 Celica. The problem is that the metalwork under the flares is very different. I'm sure it can be done, there is another dude over here with an SA63 he's done it on...but it would take a fair bit of work. One of the ends is easier than the other, sorry, can't remember which.
Thats what I would do if your serious about it. For the rear you'll have to cut back the lips (which will likely require some welding to stich the skin back to the body) and you'll have to drill a bunch of holes.