need experts on wheels

[BlazinKenK]

Hi guys, Sadly I only know enough to cost me extra money, so hopefully someone can help me identify if these wheels will fit my 72 Blazer 4X4. The guy selling them simply says that they are 16" MB wheels 6 lug and they came off his tahoe. I don't know what I need to ask to make sure they will fit. All I know is the 6 lug 5.5? If you can help me ask the right questions, it would be greatly appreciated. I couldn't find these exact one's on the internet, so I've asked him for the model instead of just the MB brand, hopefully I can get some specs from the net if I can find them.

Any help would be greatly appreciated

Thanks
Ken