1989
Much appreciate with the rather quick response Ryan.
So the R1001 is basically the same Pulley I have on my '95 currently.
Now, on top of the R1050, I went out to the actual project car and took a look at the pulleys installed.
On the JS the pulley is etched with SCI Eliminator 1000. The water pump pulley says R1005 and the alternator says R1004.
Every pulley is clear anodized silver, except for the R1001 which is show polished.
-Corey