According to a Muscle Mustangs and Fast Fords article there were 5,767 (plus the unknown 1983 number out of the 448 sedan total) SSPs built. Article has total for each year except 1982-83 (I added in the 406 for 1982).
http://www.musclemustangfastfords.co...les/index.html
Other sources (2 main SSP web sites) state approx. 15,000. Anybody know the real number?