I don't know if this will work on your 97, but this is what I did:
On my 06, 2500 when I installed H2 wheels, (After making sure all lug nuts were tight. ) I bought additional stock Dodge lug nuts, and inst. on top of the existing nuts. (On mine, there were 2 or 3 stud threads sticking out of the lug nuts. ) That brought the added nuts out far enough so the stock hub cap clips, would snap onto them. I think I used an additional 4 nuts per wheel.
Warning! If you do this, do not torque the added nuts like the ones holding the wheel on. With only engaging 2 or 3 threads, it will strip the threads. I suggest you put them on finger tight, then add a little more with pliers. I will not say how I know this can happen, but I will say, "It wasn't me!"
Good Luck, Ray