Question [Q] QandA Want to upgrade from 4.2.2 Gnex

I would like to upgrade my verizon us google nexus sch 1515 currently rooted with insecure boot image and loader. I am currently running 4.2.2 and would like to upgrade so i can apply this rom located here I have been googling and searching for a few days across multiple sites and cant come up with a definitive solution. If its possible i would like to try it. I am sorry if this has already been answered but to lots of searching and coming up with nothing i decided to post here on xda. Happy to answer any questions you may have.