MustangForums.com - Need some help with fox wheels

Some of you are probably getting sick of my wheel and tire problems. Guess what? I have another. The two prostars i bought are not the same as my other two. I have the old style XP's, that was before weld went bankrupt when they starting selling to the public. American racing bought them out and still use the weld name. The wheels have enough difference to notice. I'm so stuck on prostars that i need some new idea's. I still may go with them, i would just have to buy two more. My 9 inch wheels are $100 more than the 8 inch, so i would exchange them and get 8 inch. What backspacing will i need with the 8 inch. Now i have 9 inch with 5.5 bs. I would like to keep the same look.
I need some new wheel idea's and proper bs with 8 inch. I have 5 lug. Help a brotha out. This is the first conversion and having to worry about bs and allthe BS>

Edit: No cobra's or draglites