I have a korean grand 2 sm-g710k and i also want to install noble rom and many other roms but they are only for sm-g7102. Can i install them on sm-g710k?
Yes, you can!
actually, porting and installing G7102 ROMS To G710K is a known method;
as @dnjscjf098 says, unpack the kernel images and change the dtb (this is the basic method)
But,
There is a simpler method that changing dtbs manually OR you cannot understand Korean in http://cafe.naver.com/ypt9/716780
https://xdaforums.com/galaxy-grand-2/development/g2kr-converter-mobile-ports-g7102-g7105-t3536631
Flash this and boom! you can use G7102 ROMS
And if u need help pm me