The lower a-arm is very hard to push down far enough to get the strut back in with the spacer, The rubber bushings are tight. You can get by with the 3" but it will be easer with them loose.

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.