If I were to offer a '70 Datsun 510 independent rear suspension for sale, would anyone be interested? It would be perfect for a narrow bodied truck like a 521, Courier/Mazda, early Toyota, etc. I'm in Bellingham, Wa. (North of Seattle) It wouldn't be something I'd ship.
I'd like to see someone make it work, but it doesn't have the best geometry for extreme drops- the arms create excessive toe as they drop.
The crossmember can be slotted to solve this issue to an extent, so it may work well for somebody!
Not trying to talk anyone out of it- the rear camber would be SICK!
-Phil