Need help with a triangulated 4 link set up

[70chall440]

I am building a AAR clone/resto mod 73 Cuda and am putting a triangulated 4 link under it. I have fab'd up the arms and notice that I get about 6" of travel in the suspension from top to where the binding in the arms stop the axle. This will accomadate the rear wheels but I am wondering if this is acceptable or not. The biggest problem I have is room for the upper arms. It is symetrical and centered but this travel issue has me wondering.