1973 Disc Brake conversion / SBP / 14" narrow steel wheels

All six cylinder a body’s that weren’t optioned with disc brakes came with nine inch small bolt pattern drums through the production of the large bolt circle up until either 1974 or 1975, I don’t remember the exact cut off date. I did not know this myself until some of our esteemed members here informed me. I can’t remember if there were still post ‘72 10 inch v8 drum brake cars with 5 on 4 bolt circles available or if the v8 mandated the new disc brake option.