1978 Dodge Brougham 18ft. Wheel options?

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Hello, I just recent bought this 1978 Dodge Brougham 18ft. I am used to 70's Dodge Tradesmans but not too familiar with RVs. I was looking into putting Slot Mags on my RV but then I started learning about coined wheels. Now the wheels that are on there now don't look coined but I haven't removed the wheels to see if the hub is coined too. This coined thing is all new to me. What are the pro and cons of doing this? I haven't seen any RV's with anything but Dully wheels so I wondering if it's even possible. Thanks for the help!