The 16x7 and 16x8 wheels in front are sort of hit and miss. Some people can run 205's on 7's with no rubbing, some rub. My friend's '86 with 205/55 on 16x7 rubs on the inner wheel well (not the fender lip), but his has experience some accident damage. So not a very good data point.
Some people can run 225/50 on 7's with minimal mods. Some need to go to the full-on fender roll and increased neg camber. One certainty here is the 951 16x8 requires you to increase neg. camber and roll the fenders.
The 225/50-16 tire is the most common choice because it's so widely available. But there are better choices. 225/45 and 215/45 are candidates because they have a shorter/smaller overall diameter and therefore give you more fender clearance. 215/45 is not a size most manufacturers supply. The 225/45 is even less common. Do a search at Tire Rack or Tires-Easy.com and you'll see only a handful of tires to choose from.
Also take note how the load rating of the tire decreases as it's aspect ratio gets smaller. Meaning, the 225/45 and 215/45 have a noticeably lower load rating than the obligatory 225/50. I don't know what the front tire minimum load rating would be for our 911s
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