Oil, everyones favorite topic

Any suggestions on what oil to use? Manual says 10W30. I am wondering if the
old rule still holds about using non-detergent to break in a rebuilt engine?
Multivis or straight grade?
Also what is recommended for oil in the tranny, and would it be better to use
non detergent in that? It's a 62 948 with a smoothcase.
I'll have to get antifreeze for it before too long also.

Dan