Nope, you'd need a NuBus adapter (not inexpensive) and only fairly expensive, later time frame NuBus cards do 60Hz output. There's no way to get 60Hz output out of the RCPII/IIsi.
Your best investment would definitely be a good MultiSync display, IMO. It's an integral tool in any 68K kit and it'll work with any Mac you might pick up in the future. For just a few bucks more you would be all set with an inexpensive Radius Color Pivot II/IIsi acting as a PDS passthru riser while it's driving your MultiSync display.
YMMV