Advantages of aftermarket upper:lower control arms

Adjustable strut rods are absolutely necessary if you use poly or Delrin LCA bushings. The factory length strut rods WILL be the wrong length.

Can you elaborate on this? Do poly LCA bushings place the LCA in a different location? I've got a set on my 66 Dart with stock strut rods and didn't notice any issues when I reassembled it, though I haven't put any miles on the car yet either.