1966 chevy project van?

i pulled the straight 6 and 3 speed trans because of some leaking seals. after it was out i started thinking about what upgrades i could do to it. So my plan is to put a chevy 572 with single speed trans. id like it to stay rear wheel drive but also rear wheel steer. possible suspension lift in the 6 inch range. id like it to be for my summer time daily driver to work etc. i will be storing it in winter as its too nice to allow the salt from the roads to start eating away at it. does anybody know of a rear wheel steer kit for this vehicle? other than taking a front diff from a 4wd chevy as it would take some major modifications for this. im hoping to find a bolt on kit. thanks also not looking for opinions on whether or not you would do this or like the idea etc. i dont tell you what to do or not do to your vehicles