What supporting mods to run a NIC cam??

[bucho]

Is anyone having any problems running say a XP cam and say maybe 1.9 rockers?

you will have some interesting "problems" yes.
I think you'd need a little headwork even to run 1.7 rockers AND an XP to realize the potential. You're better off stepping up to a bigger cam instead of cam AND rockers unless you throw in heads...