ok. comming back to boiling problem.
water pomp - was/is super extra lika new
radiator- was/is clean, water flowing like crazyany ideas?
as a temporary solution will put sd33 and here another questions is comming- exhaust will fit from current sd33t or not?

on spring when snow will go away i'm thinking about last possibility which is crack on a block liner. i'll do crack test and see.