I noticed it has the round gauges with base gauges (SS) or optional gauges (Custom). Anything else that might point either way? No documents though.
http://cgi.ebay.com/ebaymotors/Chev...ject_W0QQitemZ300372324976QQcmdZViewItemQQptZUS_Cars_Trucks?hash=item45ef95f270
http://cgi.ebay.com/ebaymotors/Chev...ject_W0QQitemZ300372324976QQcmdZViewItemQQptZUS_Cars_Trucks?hash=item45ef95f270