Spindle rubs on upper control arm

[63longfleet]

Ok so here is my latest dumb question. I installed control arms off a 79 suburban on my 63. I wanted the rubber bushings and such. The disc brake kit I ordered from POL came with 2.5" drop spindles. When i bolt it all back together the top of the spindle locks on the top control arm and will not move. Should i have used the 79 springs? are the control arms that different? I am at a loss here and really was hoping to have a rolling truck again this weekend. Any help greatly appreciated Thanks