Wheels that fit

[LuckyLightning]

Hey all, I have a set of 32x11.5x15 Pro Comp Mud Terrain tires mounted on stock Wagoneer 15x7 rims with 6 on 5.5 bolt pattern (that's what I'm told anyway). I'm looking at putting these on a '95 Z-71 but I'm concerned about the lugnuts.

I placed these rims on my '63 Chevy to basically hold it up until I can get it rolling again (see pic below). I used the lugs that I had (off a set of mid-80's 4x4 'burb wheels) and they just seemed to go on funny, like it wasn't a solid flush fit. I guess I shouldn't be too surprised, right?

So my question is, now that I can finally use them on a 4x4, what kind of lugnuts should I be using to hold these wheels on the Z-71? Should I use the lugs that are currently used on the Z-71's wheels or should I be looking for something else that fits flush on the Wagoneer wheels but has the same thread as what the Chevy needs? Dunno if that's even right, but you can see that I'm real rusty with wheels and lugs so any help would be much-o appreciated.