They don't make the Dalars' in our bolt pattern in 10", I was hoping to go wider too. The 8.5" ones are 42mm offset. I put a 255/35-20 tire on these all around, and though they are directional, I can rotate them front to rear which is better than not being able to at all if they were staggered widths+directional. I'm surprised at the comments I get everywhere I go with the car... I was thinking of going with the black Dalars' wth the chrome edge and center cap, but wasn't sure how it would look on a red car (I was planning on getting rid of the chrome around the belt line too to smooth it out.) If you swap over to the Mustang hubs/brakes, there is a few more choices for size on the Dalars, but I have no idea on the fitment still though.
I have the Cobra front calipers on it and the bigger Cobra slotted rotors all around too. They make a big difference with the larger/heavier rims, I'm glad I did it.
As for your PM about the pics, they look like tires from the rear, not much to see
(The car is away for the winter actually, so I can't do anything till spring.) The tires I put on are slightly bigger than the stock diameter (1/4" around), 245/35-20 would be the closest. With the larger ones, I had to roll the rear fender lip so it wouldn't hit when I went over good dips the road or train tracks etc. It only rubbed slightly once in a while, but I figured I'd save the tires some grief and roll them. My car is about 2" lower than stock too. I corrected for the tire size with a Speed-Cal when I did the rear gears and tune. With the 245's you probably wouldn't need to worry about that.