Auto-X / Roadrace rear suspension 1969 Valiant

Personally, I like the drag race 4-link, more adjustability, and you can get a setup off Speedway for $300. Add a watts link kit for $400 (just noticed Speedway has a kit for $100), and shocks for $600 and you're at ~$1300. I'm a cheap bastard though.

The DSE kit does come with johnny joints though, so that is plus.