Is it even possible with them being reverse flow and all? If so, what does it require, and what are the advantages and disadvantages?

 

The standard coolant passages that go from the water jaket up to the intake manifold are not cast into the heads. That means you can't even add a drilled hole from the standard port location on the intake flange to the water jacket to convert the heads to a standard flow head. Other than that they will bolt on.

One option would be to open up the pipe taped holes in the front of the head to about 1" npt and then connect them somehow togeter, feed them to a thermostat and then back to the radiator. This would essentially convert them to standard flow cooling.

Another option, if you would like to retain reverse flow cooling, would be to run a stand alone universial electric water pump, drill and tap the front of the heads for 1" or .75" npt, run the coolant in through the heads and then have a manifold created that connects the old water pump block ports together with a thermostat and run that back to the water pump. this would essecntially convert a standard flow block to reverse flow. Just be sure to retian the air bleed line on the back of the heads to avoid air pockets towards the rear of the engine. This is something I thoght about doing on my big block but couldn't find a unverisal water pump that could stand up to street use