G-Body / 79 MC - what rear tire sizes on 18x9.5?

["Swoosh"]

bought the boss 338 rims for my 79 monte carlo project:



18 x 8 Front wheels
Offset: +2mm, Backspace: 4 1/2"

18 x 9.5" Rear wheels
Offset: -4mm, Backspace: 5"

I was looking for 275/35-18 tires for the 9.5x18 rear rim. but an awesome deal came across on some bridgestone potzenzas but 285/35-18. what do you think, they'll fit with the 18x9.5 on my 79 MC??

still couldn't bolt the rims on the car because this is how it looks like:

(old pic from 2007)


...plus the cold snow outside. can't even open the barn doors to it lol..