need help with suspesion swap

[brandonh]

i have a 69 chevy non disk brake 6 bolt and im putting 73-87 style 3 inch drop spindles on it well i have put 73-87 style ball joints in my stock upper control arm. well when i put the spindle on the castle nut goes up so far that i cotter wont even go through it, its to low. what do i need to do, do i need 73-87 upper control arms, what else do i need to change, do get this thing fixed.