1973 Original engine belts

[RICs73Z28/L82]

There are several different belt companies with GM numbers on them. Do anyone know the company that produced original assembly line belts in 1973. Was it Gates, Delco, Goodyear or someone else. It thinking originality would be Delco, but do anyone know for sure?

 

[carnino73]

There are several different belt companies with GM numbers on them. Do anyone know the company that produced original assembly line belts in 1973. Was it Gates, Delco, Goodyear or someone else. It thinking originality would be Delco, but do anyone know for sure?

My originals say Dayco

 

[RICs73Z28/L82]

My originals say Dayco

Thanks. This is one that I thought could be the case. Thanks for the info, Do your originals have dates?

 

[carnino73]

Thanks. This is one that I thought could be the case. Thanks for the info, Do your originals have dates?

Not sure what the date format would be. Here is the alt, smog belt. Car was built 4/73