17x8 245/45/17's all around on mine as well. I really think it's the perfect car to tire ratio if you like twisty road but don't want to get crazy or make the car look too modern. In honesty with some of the compounds they have out now it's shocking how much grip you can get out of a 245 series tire.
My suspension is all non stock stuff and I did have to make custom steering stops to keep my rim from eating itself on my UCA at full lock. Makes parking lots annoying but canyons fun. So canyons won that debate.
What brand are your wheels and do you know what the back spacing is?
For the record my wheels came with the car. Was the one thing I kept actually. (and I did so because the fit was so spot on, plus I like the look) I believe them to be 4.75 BS and also believe they are american racing TT's from sometime in the 90's as that was when the PO was trying to make it in to an eleanor clone before getting in over his head and abandoning it until I found it. I will see if I have time this weekend to pull a measurement. Also my fenders are slightly rolled, but I get no rubbing or interference.
I went to look at a set of 95 Mustang gt tri bar 17x8
this morning not really a fan of the style but the guy only wanted 80 bucks for all 4 so it seemed like a cheap way into some 17's. I got there and 1 had a crack on the backside bead area .
I've also been eyeballing these on Ebay
I think so/hope so ,But you still seem skeptical though. If it doesn't work out maybe I can break even.
Obviously you've seen this thread ,you posted in it last Help!!! My bullitt wheels don't fit.
and a pic of the threads OP's car