I understand how to set the head in place, and lay in the cam at a point that will not cause valve/piston contact. My concern was the machinists warning about pulling the threads. If this is a legitimate concern, I would need to lay the cam, turn it to a point where two lobes are down for the same rocker assembly, turn the cam so that two lobes are down for another assembly, etc. If I turn the cam witht the head in place, then I become concerned about valve/piston contact.
It sounds like I can mount and torque the head, turn the cam to the correct position relative to motor position (timed) and evenly tighten down the rocker arm assemblies without pulling rocker arm mounting hole threads. If, by being careful, I don't have to worry about pulling the threads, I think I'm good to go.
Thanks for the help, and I still welcome additional replies.
'01 C Class, Six Speed
'84 Euro 240D, manual, 533K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in