I have converted standards to step-in's. Bought the kit though. Now looking at what is required. You can modify. The only way you can make the standard heal blocks work as new step in toe blocks is file down the resting position to the same angle the step-in's require because your toe height on the boot is lower than the heal height. Other than that, it would work without buying the toe bails because their the same part number which I verified. Or just buy the toe blocks for 25.00 bucks each, use the same bails and get the heal replacement parts at 65.00