1965 DART GT 273 4BBL

I think the 5-50 warranty covered 7.25 rears that broke and replaced them with 8.75 in manual trans only. Rumor mill talk, but makes sense.
Did you read my post?
The opposite was true in my personal experience in1966 at Chuck Hutton Dodge in Columbus, GA. Other zones may have had different experiences but not in the Atlanta zone.