Early K code Mustangs had this longer spacer, rather than the later short spacer according Mannell's book and the period ford parts books. The markings on this are similar though to the later one. Also according to the period Ford parts book, there is no fan shroud when this spacer is used. I was told by the owner who acquired the car in 1973 that there was no fan shroud on the car when he bought it, and that he added the one that's on it today.
There is only one other original car that I have looked at with documented ownership history that had this spacer and no shroud - and the second owner of that car told me that he replaced the original spacer with a short one. Both cars are Dearborn 09F planned build date cars.
Anyone have any evidence of this setup with longer spacer and no fan shroud?
TIA
-Scott