Sorry, it was morning... literal was just a term, some people call dual cardan joints CV which they technically are, but I meant they are like a car and have several balls that take the load not the center alignment ball on a dual cardan...
They might allow smoother operation at greater angle, but they weren't designed to take more than stock ride height, same with the CV joint on the front shaft of the Explorer I'm working on... it seems pretty limited...
Best setup I believe is a 1354 with a '90-97 front shaft that is dual cardan, and I don't know if it is all regular cab short bed Rangers but mine has a dual cardan rear shaft as well, zero driveline vibration at any speed with the hubs locked in or not...