The 12 volt starter can have the internals changed to 6 volt stuff and the 6 volt starter can have the internals switched to 12 volt stuff. Since those starters are Mexico remanufactured they could be anything. Do you not have an old time Starter/Alternator/Generator Shop within driving distance? If you do, they can save you on your Aspirin bill.

Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)