From my findings for a 1st gen Mustang, there is no "F" DSO. Are you sure your not looking at the paint code or possibly the date code? Or maybe even the axle or trans code....Just my thoughts.
But, again, need to know the year and preferably a pic.
1969 Mach 1, MCA Conservator #256
MCA 69-70 Gold Card Judge
Last edited by 69mach351W; 02-23-2013 at 02:00 PM.