Ok here is my heater core (all copper) works very well. I made new water connections from 16mm ID copper pipe, and put on Claber quick click connections, don't mind the dust on radiator it's clean now.
And finaly what was gained. TB 1G @ 1570 (10*157) seti load 35°C, water temp 25°C and 22°C ambient temp.
And once more everything is very silent, so I have no trouble sleeping with pc running 24/7, and yeah my temp drop 4°C from my previous setup,mostly because of Eheim and 1/2" pipes, the fans that I also changed are actualy lower cfm than Sunons that I had before, but makes less noise.
The case is a little gheto, but wait for 6 more months when I come back from army, and I'll make acrylic case, and put everything in the case.