I put an 08 tunnel on a 05 bulkhead. The diamond drive is different, but you can key off of the bulkhead drive holes and trim the tunnel accordingly. I used a few key locating holes (suspension mounting, most of the bulkhead rivet holes, etc) to get the newer tunnel accurately installed. You will also find a few holes like the steering post need to be drilled to match the earlier bulkhead. A few little oddities around the foot wells need to be addressed and then you're done! I really like the newer tunnel on my sled.........good luck!