Thanks, Jeff and Bob. I looked at the assembly guide and there is S8 finish ( Bright Zinc) and S2 ( Phosphate and oil).
Look at page 16 in the Chassis assembly manual.
Dave- I was up against this issue too because of the years the vehicle had been disassembled. No cell phones with cameras when I started this project.. Wait, no civilian use of cell/satellite phones period then...lol
Anyway, they are a great tool for these kinds of projects now.