OK, makes sense upon seeing the 67 390 fan shroud. But back to the original question, what part number would be on the correct 24" manual trans small block radiator? My D0ZE-B1 side strap has a date code of 0BB, which would be a decent date for a March 17th build date. Is it possible the original side strap was used with the incorrect tanks and core when rebuilt sometime in the last 50 years? Or was that just a coincidence from the parts pile the radiator shop had lying around? MustangTek site lists the D0ZE-A as correct and the D0ZE-B for auto which is even more confusing.