Trying to determine what engineering number is correct for a Nov. '66 built 289 Auto Trans Mustang.
From an April 68 MPC page (interesting since it has caused tons of issues for owner) They don't list different starters for different transmissions for Mustangs as they do for other models. Since this is likely an oversight I offer the following possibility
67 289 w/Automatic - C4OF-1101-A or C7AF1101-B
67 289 w/3 & 4 Spd - C6AF-1101-B or C7AF-1101-D
These are listed as identification numbers - different from part numbers or replacement part numbers
For others - other years have different identification numbers that those listed above though the same issue of no difference for Mustang applications but different ones for other Ford models remain. And we thought all those wrong starters we got from parts houses was they fault - now it appears that it may have started with Ford
I would also think that lead time for a date code should be about 3-4 weeks for the starter, given other dates throughout my 11/2/1966 built San Jose example...........
Have a couple 66 San Jose example where the starter was dated same month as the projected build date assigned to the car.
Can't determine weeks (could be sure even if I could with just a projected date) since the stamping style didn't always include the day of month on the starter