Just purchased a 87 Minnie that the previous owner had a New Holley 4 bbl recently put on, went to get the rig smogged and the tech said it was running too rich and it didn't pass. When he did the H...
X3 - forget the carb, you'll just spend a ton of money to get it right (maybe). Go for the aftermarket throttle body fuel injection system. They tune themselves and give much better performance, especially for an RV.