The 1960 - 1966 Chevrolet & GMC Pickups Factory Correct Restoration Thread

[f66]

Need help with parts numbers and ID. Attached are pictures of my 1966 C20 Bendix power booster and master cylinder. My understanding is these trucks could come with either Bendix or Delco Moraine boosters and M/C.
Questions:
1. The M/C has part number 618082 cast in the bottom and has a screw on cap. Is this potentially an original or replacement original?
2. What are the Bendix part numbers for the Master cylinder, and part number for the booster?
3. What are the Delco Moraine part numbers for the Master cylinder, and part number for the booster?

Thanks for the help, Frank