what year 200x? Not sure off the top of my head but go to partzilla.com and look at the factory schematics which are free with OEM part numbers. From there you can see where they go.
I cant remember if I had them in my 83-85 motor or not
Cam chain tensioner, those two lay together and set the correct tension. when the motor is running you loosen the bolt that screws into that set up and it sets the correct cam tension. Then you tighten the bolt back down to the specific torque. Don't quote me but i think its around 12ft lbs.