The body was redesigned at TS60,000, and the spare tire well enlarged slightly. "Enlarged" means it will take a 165 easily; I'm not sure about the larger sizes, but I'm guessing that a 175 will still be somewhere between extremely snug and impossible unless you deflate the tire.
Personally, I'm quite happy with the 135 "compact spare" that I found in NOS condition at a local junkyard. The only drawback (if you call it that) is that I have to carry a rolled up blanket to keep it from sliding around in the spare tire well. But the blanket is really handy for either roadside tech sessions or picnics, and both the blanket and tire only set me back about $25.
Only had to use it once, but I drove over an hour at 75+ mph with no problems. I was expecting handling to be squirrelly, but I couldn't even tell the difference beyond a very slight list to the side with the compact spare (IIRC, the other side was wearing a 195/60 at the time). Of course I didn't really push it to the limit on handling, either.