Ok I took your advise and installed TWRP through fast boot and it actually took unlike trying to do it through goo manager. It seems compared to the other root methods I have done that HTC Dev does not grant superuser permission and I had to let TWRP do it for me. I have since been granted SU and have loaded Viper rom through TWRP. This was a little confusing coming from root methods that include super user in its own package.
I added to your Thanks!