Price of 8.75 option for 1967 barracuda

Thanks, I had a 904 trans,but I've seen 273 hipo autos with an 8.75,was the trialer towing package including the 8.75. A friend from back in the day said he saw A bodies withe an 8.75 rear in salvage yards? 7.25 rear had 323.with big 15 inch G series tire blew the spider gears twice.