I assume you mean non self aligning rocker rollers. If so yes, you will need guideplates and also hardened pushrods (you factory one are not hardened).
If you are installing rockers that require guide plates then you will have to have your heads machined for screw in studs that are larger than stock. If you dont' want to go that route you can do what I did and by roller tip rockers from RPM (www.raceprovenmotors.com) that bolt right up to the stock studs and are still self aligning.