If you was to add an upper BJ spacer and left the lower control arm alone the differant angles of the two control arms would through your allignment so far off you would never get it alligned and your bump steer would be bad. A better way to keep your upper arm from hitting is keep your sway bar attached or add a limit strap. I have 4 inches of lift and with over 100,000 miles, trips to Moab and a little sand and snow jumpping mine has never hit.

Dennis

95 Sportage, gone but not forgotten.
98 Jeep TJ, 4" Zone springs with RC Long arms, Ford 8.8", 4.56 gears & Detroit locker rear, D30, 4.56 & Detroit Trutrack front.