[oh one ls1 SS]

im looken to get a set of these http://www.jegs.com/webapp/wcs/store...32806_-1_36660 for the summer (big's n lil's) i was informed before that the bolt pattern was 5 x 4 3/4 but what back spacing and size do you suggest? i dont wanna roll the fender or do the BFH mod yet. i was thinking 3 1/2 or 4 inch up front and wanted to get 10'' out back but was told to go with 8'' cuz the 10 wount fit. thanks