Did 1973 318 V8 come from factory with plastic teeth on timing gears?

Did 1973 318 V8 have plastic teeth on the timing gears from the factory?
Sure enough. Here’s the 318 in my ‘73 Swinger at around 120k on the clock. 274D5213-8752-4C45-A22C-7F0E48CD46DE.jpeg3498E7A5-410B-406E-83FC-069FC469A143.jpeg8DD7AB2E-0E3F-4B31-84A3-28798E895B64.jpeg