Guys,

Can anyone tell me what parts go in the areas I've circled in the picture below and where to purchase?

 

On the passenger side pic, there is a rubber bumper that goes there (both sides actually - large flat bumper). It comes with the hood bumper kit (the others go on the bottom lip of the hood). Search - Classic Haulers F-1 Parts


On the other pic, it looks like the same hole has been filled and the others drilled. Mine doesn't have the four small holes on your right side pic.

 

Yes, I agree. The big hole is for the hood bumper but with my cab moving around on worn mounts I couldn't get them to stay in as I couldn't get the hood adjusted correctly. Your PO must have mounted something inside where the four little holes are