Between 1981 and 1987 there were only approximately 224 Special Wishes Flachbau's that came out of the Werke-I facility. In 1987, the 505 and 506 option codes were developed and became available from any Porsche dealership. The 505/506 optioned cars could be further enhanced by the Werke-I people, but it was on the order of special color schemes for exterior and interior plus some unusual drive train requests. The special body panels were installed on the production line for the slants from 1987 on....
The aftermarket conversions done, is anybody's guess. A lot more conversions than factory jobs out there, for sure.
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, 8:41 R&P