thanks centerline... actually - the fact that the parts are hard to find, and the right gear ratio's would kill that as an option anywhere. doesn't seem wise to put it together in a way that would be hard to get parts. thought it was a type of suspension, and not an actual jag rear-end / setup. don't really want a jag rear under my rig.
reason I was considering the 4-link / a-arm is I could do it for under a grand. obviously springs would be a lot cheaper because all I'd have to do is find a donor vehicle.
how about the quality of ride betweent the 4 link vs. a-arm vs. springs? (would choose cheaper option unless there's a major difference)