Traditional 4 link or a 4 link trailing arm (think trophy truck where the coilovers and bypasses attach midway along the outer arms)? Either way, i have no expereince with the raptor but check out some of the 4x4 forums, like pirate4x4. They have a lot of good info on how to properly set up each system.
Just out of personal curiousity, are you going full-blown race truck, rock-crawler, or just want to try something different? I had a triangulated 4 link on my buggy and it was sweet for articulation but not something I would want to drive on the road. On the other hand, i have a 5 link trailing arm system on my wildcat and its amazing, not a street legal vehicle but i can hit bumps at any speed and hardly feel it. In any case, post pics as I'd like to see your progress. I'm jealous of you raptor guys.