I need to split this file and create files with "+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+" as the delimiter.
The file names need to be the contents of the next line after the delimiter(FIRST_ITEM,SECOND_ITEM...so on..).
That's the limit of a record in awk, you can use gawk instead.
Another option is to use the fold command first to wrap the long lines. Check the man page of fold.