I haven't done it on an RBV, but I have done it. In my case I was increasing the flow capabilities of the engine well beyond the usefulness of a stock and outdated open loop type EFI system. My choice was either a $2000 programmable EFI system, or $300 for a used triple Weber 2 bbl setup.
You'll need to:
replace the intake manifold
install a carburetor and air filter
adapt the throttle cable to attach to the carb instead of the EFI throttle body
run a choke cable if the carb has a manual choke
adapt (or replace) the fuel system
The fuel system is often the most difficult part. The EFI fuel system supplies fuel at a pressure much too high for a carburetor. The best way to do it is to replace the fuel tank and pump with that from a carb'ed vehicle, make the pressure line fit the pump and the carburetor on each end, and remove the return line. The vehicle I was working on had an EFI pump that was external to the tank, so I just plugged the return line and the low pressure Holley pump was a direct replacement. Most modern vehicles use in-tank pumps which complicates the situation. I have heard of fuel pressure regulators that will reduce the EFI pumps pressure to something suitable for a carb and allow you to keep your tank and fuel pump, but have no direct experience with this. It might also be possible to remove the in-tank pump from the sending unit assembly and extend the metal line down to the bottom of the tank, and then install an external pump, but I don't know that I've ever heard of this done.
After that it will run, but you'll want to tie up some loose ends. The computer can come out and the fuel injection will usually have it's own sensors that you'll want to unplug, in addition to the fuel injector harness. The harness may be bundled together with stuff that needs to stay - like sensors for your water temp and oil pressure gauges, so you'll need to run new wire to these sensors so your gauges will work.
If the EFI computer is integrated with the ignition system, that's a can of worms that I won't be able to help with. Chances are if you have a distributor, you'll be ok, but on a distributorless system, I'm not sure.