Hi Dale,
Sorry you havent got a prompt response. I hate to say it but I feel Car forums are on the decline. Its a shame as I still visit them but no where near as often as I once did.
Anyways, Yes, 100% 255/35/19 will fit on standard set up. I ran 265/30/20 on 9j (The worst deicsioin ever made) BUT if you actually want the perfect 'dialled in' set up, Run 235 on the same set up. If you buy a premium tyre like Conti's or Michelin, the stretch is tiny!!! But IF not planning to drop the car any more, 255's is fine albeit a little heavier than 235's.