What's the largest tires to be used with 94-98 saleen wheels on a fox

[kr mstg]

I'm wanting 18x9 frt and 18x10 rear. I was told that 265/35 frt and 295/30 rear on a 93 gt drop top. If your running these sizes, how did you?? If anyone knows for certain what fits and what won't please post..I heard of a guy run 10's all the way around, but that was b4 the boards crashed.. also what offset are the frt and rear wheels...Pics would be nice ..