Dually wheels on a 14bolt rear end?

[79chevyc20]

Hi,
I have a 79 Chevy C20 with single rear wheels on a full floater 14 bolt rear end. Will dually wheels fit? If not, what will they hit? I am looking for a dually parts truck or just parts, but it may be easier to just make it work with the parts I have now.

Thanks,
Tom