The parts were labeled Autolite through 1971. They were re-labeled Motorcraft parts beginning 1972. Same for carburetors and everything else. The name changed for legal reasons, otherwise the parts are identical. Ford was accused of having a monopoly or something like that. They obviously lost the court battle. Motorcraft did not exist prior to 1972.
That's also why Ford's high perf parts were sold via a sub-division of Autolite through 1971. They became Off Highway Only (OHO) parts in 1972. That was a one year operation. High Perf parts became verboten in early 1973. Some Hi Perf parts were shuffled out the back door to various race contractors at that time (like Holman Moody). Eventually an inventory of race parts was re-established at Ford, hidden amongst Ford's massive parts inventory. Locations and part numbers were known only to race teams and select contractors.