I agree that leaving them on the shelf is the best thing to do. My Dad's 64 has 2 piece wheels. The only guy we could find that wasn't scared of them was a guy in his 70's that still changes tires for a living. The only reason we didn't replace Dad's wheels is because he has a 1 ton and the lug studs are smaller OD than modern wheels.
Note: This is the first installment of an article that will eventually cover all the medium duty trucks (1.5-ton & 2-ton conventional and COE), 'late '30's through '73. For starters, we're covering 3/4-ton through 2-ton AD trucks.
scroll down to 'split rims' if you'd like to read an explanation as to why not to use them.
I agree with the other folks, get one piece wheels.
I still run the split rims both the two & three piece types. Of course I fix them myself. I fix all my tires its part of being self reliant. Its simple if you know how. a tire hammer and a few spoons is all that's required. if they are in good condition they are no more dangerious than any other rim. I use a long hose to inflate tires. and I wrap a chain around through the hole in the center and the tire. I had the bead break when inflating a tire mounted on a conventional rim while it was still on the tire machine. I thought that my arm was broken? man that hurt like the dickens! I never done that no more times.