Hey Dwight...
I would suggest waiting and install the 996 cluster. Here is the break down on my cost for the modification;
996 X71 Instrument Cluster $250.00
996 Leather Surround $85.00
996 Hazard Button $20.53
Oil Sender $56.63
Wires $17.10
Re-Set Odometer $89.00
Total $518.26
Sold 986 Cluster (Cleared after shipping and eBay Fees) $163.69
Total Cost for 996 Cluster $354.57
I could have cut $85 off the total by keeping the Boxster and modifying it. But the stitched leather one looked too good to pass up. That would have made the total cost for me $269.57.
I did the labor myself and with all the stuff on the net it was very easy.
I bought the 996 cluster, leather surround and hazard button from qualityporscheparts on eBay. The oil sender and wires from Sunset Porsche.
The 996 is so much nicer than the Boxster. If offers addition features and a better layout besides the two extra gauges.
Just a thought.