I'm ashamed to say this, but I haven't done a darned thing to the GP suspension since I started this thread. It's still perfectly driveable and I take it out from time to time.
There's so much rust remediation that's required on the rear (especially the sway bar links), that I put the GP work on hold until I can build my workshop with a lift. I'd much rather wait a while than be under the car crawling around on my back. I have concrete poured for the new shop, building materials are here, lift is in storage, just need to put the building up. But the early hot weather here has made me lose all motivation. Original schedule was put the building up in early May, but I could write a whole story about construction material (especially cement/concrete) and labor shortages.
I'll get it erected eventually (steel frame bolt together building), and then work on the GP will begin once I get electric & the lift set up. I have all the parts to do a complete suspension overhaul front and rear. A bonus is the GP officially reached antique status in the state of KY; got historic plates for it, and now my annual registration should be less than a dollar a year.