thats alot of tire to stuff under there.
one way of finding out would be to jack up the rear, pop off your stock wheels and toss those big boys on. let the car down gently. i'm thinking you'll have either springplate or fender lip clearance issues.
225's seem pretty extreme. most of the cal-look guys run 205/70's. bruce tweddle has 215's on his car i think.
195's or 185's with a thick aspect ratio would look allright too.