The way I limit risk is to use a paste on the cam rather than oil. Crane has a good moly paste for it
http://www.cranecams.com/303.pdf . I put some on when I final assemble, leave the intake off until the rockers and preload and everything is done, then reapply with a brush as best I can before I seal it up. Try not to turn it much to prelube - I turn it slow and as soon as both rocker shafts have oil, return it to TDC on compression for #1, and it's ready to go.
