does a 5x5 bolt pattern work?

[G NASTY]

? any problems if it does fit?

 

[1Badelky]

nope, g-bodys are 5x4.75

 

[UNGN]

It does if you swapped out the Front Rotors (by using the B-body front brake swap, for example) and Rear brakes/Axles and are using Impala SS wheels.

Do they work with an unmodified car?

uh, no.

 

[49-blues]

Or use billet adapters.