I have a set of 16x7 and 16x8 phonedials off a 951 and they're 52.3 mm offset.
I'm doing the 944 N/A conversion w/dropped spindles (I have all the used parts I need except all the parts that I'm buying brand new, like rotors, caliper rebuild kits, etc.)
I'll likely be running 195/50s up front, or maybe 45 series or 40 if I can find them. Not really sure about the rear yet, probably like 205/50s, or 205/45s. I may completely change my mind later about tire sizes though.
Once I get my brakes installed I'll just test fit them with the stock 951 tires I still have on the rims. I have a set of 1" spacers I pilfered from the 944 that I got all of my used parts off of, in case I need them. I figure I can have them milled down if I need them to be less than an inch thick.
I'm pretty sure that if you got a set with the same offset as mine, you should be able to fit them under stock fenders. You'll probably need spacers though.
Oh and I'm going to get my phonedials polished, oooooooh...
