The Kaase heads I have worked on were great with a simple cartridge roll clean up. If I were building another 460type engine, that would be my second choice after the Boss heads. There are some great heads available, A460, B460, Blue thunder, Edelbrock RPM, and Kaase P51, Kaase Boss, Motorsports CJ. All these heads will flow big numbers with porting. Get the matching intake manifold, and try to keep the ports a little smaller than the head, or match the heads. Joe-JDC