Re: Rear tire sizes
Reply #2 –
When I had my Sport in it's final configuration, I had 275/40/17 on the back. No rolling, but the tires were fairly close IIRC. Quad shocks are a no-go unless you come up with some funky weird offset wheels, but then you'll tire protruding and probably other issues..
I had mine on Bullit wheels from something like an '03, '04 Mustang. The fit was perfect, too. Fronts were 245/45 and also fit well, no rubbing etc.
As an aside and not much relevance here, those same wheels/tires are now on my '87 Stang notch and unless I did body work, the combo is about as big as can be stuffed in there. One thing about The Tbirds...you can put a little more tire under it and have some wiggle room.