Mark,
That's one of my concerns is the 9's do move out toward the fender about 3/8 of an inch.
I might have a line on a set of 7's and 9's and if they check out? I'll just go with them and raise the rear to 24" if needed, I wouldn't think a 1/4" would make much difference though?
And in front I might be good if it's the left front that is a problem as I had to replace that fender and the brand new one came with a cresent cut out and rolled a bit on the lip were the tires rub.
Cheers