68 Buick GS California, biggest rear Wheel /tire combination?

[Sebambam]

Hey guys

i was wondering if i can find examples, pics and infos on the

biggest Wheel /Tire combination
on the rear of a 68' Buick GS

i dont mind doing minor fender works, but not much more

i read 15x8 5.5 BS with 325/50 can be possible with minor fenderworks?



is a 10 inch wheel possible?
what you think?

its stock hight in the back!
would airhocks help to create the needed space/clearance?

appreciate your help