I'm running 275's in the front on a 9" rim. zero issues. 315's out back on a 10.5" rim zero issues.
With the stock 8" rim. I would prolly go with either the stock 245's or a 255 in the front. You can run a 275 but they get a slight bulge. IMO looks good on the back.
with 17x8 wheels the biggest tires you should go with is 255's or else your
handeling will be all over the place......with bad steering response.....
plus with that much sidewall bulge your tires will look like doughnuts...
I run 9's in the front with 275's and 10.5's in the rear with 315's. Ive rubbed the inner fender maybe twice in the front while wheel was turned all the way. only in my driveway thats got a 2-3" rain gutter out front, never under normal or hard driving.