What type of filter element (I mean size of smallest particle of contamination, in microns) should be used in case of break in procedure for small block chevy 350, buld from scratch.
It's mostly stock engine, all parts were new, out from the boxs.

Really, I don't know - the 10 microns filter may be clogged during break in after first start, and it may be cause of low oil pressure. Or its ok, but I should change oil filter 2-3 times during first 100km? (yeah, we heve kilometers here, not miles)))))

What's your opinion?