We've got the Full Explorer rear end (2001 edition) under our '50. I was a little worried about using the 3 rear spring set when I took off the stock 8? original spring set up but we've used it for hauling couches, etc. It works fine.
Is the ride as smooth as my late model cars? No. It's a truck - It's smooth at highway speed a bit bumpy around town over potholes etc.
Ben in Austin