66 Dart GT HT Whatsitgonnabe?

360DartGT66 said
Of course it helps!

I suspected I would need to get the lower control arm out. But first I will need to release some tension in the torsion bar, no?

Yes

360DartGT66 said
Oh well, there's got to be an instructive video on Youtube somewhere.

I really would like to get my hands on lower control arms for sway bar since I'm planning on installing one. Or two. :)

Is it a good idea to change to large ball joint upper control arms? Or will I run into spare parts problems?

I read someplace someone has the sway bar mounts that can be welded to a LCA that didn't originally have them or you could fabricate them yourself. The small ball joint UCA (which I assume you have) is used with drum or the Kelsey Hayes disc brakes. The large ball joint UCA is used with the 73-76 style disc brakes. Parts are readily available like at Rock Auto.