I'm assuming you're talking about the kit that came with the 1.75" rear coil spacer as well? Does that spacer have a solid plate above the coil? It's not open to above? I'm running the Top Gun Customz 0.75" coil spacers and mine are open (link below with some pictures).
The coil spacer should not change anything to stop you from running the bags other than you possibly not being able to run the airline through it if it has a solid plate rather than a hole (which is what I'm assuming Rough Country as done). You could probably just drill a larger hole in the plate on your spacer to allow the airline to run through it.