Just got these parts in, available now. It's a pair of calibration IC's for the boost/tach module for our GN's and Ttypes, the two custom chips on the PC board in the module. If your tach or boost bar-graph is out of whack (most of them are by now) you NEED this! Look at:
http://www.casperselectronics.com/ and do a search on the 2nd. page search box for 103070. This is the part number of the IC pair. To understand what the IC's do, look at:
http://www.installationinstructions.com/caspers/103070.pdf
You can open the installation page if you have Adobe Acrobat Reader. The IC's are in stock and I have limited quantities. These IC's are specifically made for the GN analog dash and it's a common failure item. The module itself is no longer available and once these chips are out, that's the end.
-John Spina
http://www.casperselectronics.com