If you are thinking the OW linear rate springs you would need to proper collar for those springs to with on the front bilsteins.. Be easier to just get the Toytec eibach springs. The beauty of the OW package was the matching if the spring rate to a specefic valving that an off the shelf bilsteins will not be able to match.
Um... I didn't realize there is a difference in the rear coil. Pretty sure they're the same whether you bought the 2.0 or the 2.5 kit. It's a 220# coil. You could ask the OW guys over at 120 if you need clarification Mark (expat) or Andries (bulldog). The number designation only refers to the diameter of the shock bodies. Now IIRC, the fronts may have had different specs, like 650# for the 2.0 and 700# for the 2.5. Hope that helps.