Join Date: Nov 1999
Location: Where the Navy sends me...
There are plenty of discussions here about making 275s fit all around on a Fox. I ran 275/40-17 R-compounds on 17x9" Cobra Rs years ago, back before I did the Maier Racing flared fenders and quarters. You'll have to do some work to the front fenders, but it's definitely do-able.
As to what tires to run, I would say it's worthwhile to stay on street tires for a bit longer. RE-71Rs, Hankook RS3s, Nitto NT05s, whatever. IMO I'd be more worried about bang-for-the-buck - which tire can stand up to the abuse and last for a while - as opposed to worrying about which will provide the best lap times. Tire Rack has the Falken Azenis 615Ks on close-out now in 255/40-17, only $106/ea.
I didn't realize there were so few options in 275/40-17 street tires these days. Tire Rack only has 6 max or extreme performance summers in 275! That's crazy.
'89 GT convertible, N/A 357W, MM front susp w/425# coil-overs and Koni D/As, MM TA/PB rear setup (Koni Yellows, 390-430# springs), Stoptech 332mm / 12" Baers, MM 6 point rollbar, Maier 1.5" flared fenders & quarters, 18x9.5" front/18x10.5" rear Enkei RPF-1s (street), 18x10" CCW C-10s (track), etc...