15" Rallye BBP Center Hole Size? Offset

Recently did an 8.8 swap, meaning I need to change out my rear wheels to15" BBP. I'm looking at local set of 15" BBP rallyes that are either 6 or 6.5 (he's not sure) and my concern is the center hole size. I see that most aftermarket are 2.75 but I suppose that's not exact. The index on my axles are 2 79. I can have them turned down, since I haven't installed them yet I'm just not finding alot of info. I suppose I could take an axle to the wheels and test fit.

Question is.. Does anyone know the center hole size? Also, what is stock offsets for 6 and 6.5?

Thanks

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