...So you really are confused about which solid rocker arms you have? Well, take a look at the first 2 photos and add these to your collection! Pictured are some very early 906 Solid Rockers (#1) along with other subsequently improved solid rockers (#2) and finally, the 911 RSR (#3 and #4). I can't identify these by part number, yet... : (

By the way, the cost to recondition each racing forged rocker arm is $45 USD and Mike Reed at "Electronic Chrome and Grind" is the preferred source for reconditioning these very rare racing parts, after all, "Webcam" uses them exclusively! You can reach Mike at (562) 946-6671, they are located in Southern California at 9132 Dice Road, Santa Fe Springs, CA 90670 - Here is their website: http://www.ecgrinding.com - The reconditioning procedure consist of grinding the rockers, hard-chroming and polishing to perfection, but you can talk to Mike directly about the process or if you have any further questions...

... http://forums.pelicanparts.com/showthread.php?s=&threadid=111847&highlight=906