draglite backspacing

[79 mustang]

I'm buying draglites tomorrow and need to know what size backspacing for the front and rear.I'm getting 15x7 for the front and 15x8 for the rear. 225/50/15 are going on the front and 245/50/15 are going on the rear.
I've heard to use 5.5 for the rear,but what about the front???????? 4.5 or 5.5

[Bob]

4.5 for the front and 5.5 for the back.

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1985 Mustang GT (http://www.mustangworks.com/cgi-bin/moi-display.cgi?26)

'85 GT 13.20 @ 105.8 / '72 Mach1
Long list...check website!!
My Website (http://www.red302.stangnet.com)

[Mach 1]

5.5 for the front and the back.

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1993 GT/AOD
'93 Mustang GT (http://www.mustangworks.com/cgi-bin/moi-display.cgi?151)