Ok if you've done those mods to your car, you should be able to handle pulling your rear stub. Did mine in one day. It's not that difficult. Also I can't tell by your picture, but the brackets for the conversions where it slides on instead of having to pull your rear stub are quite thick, the one you hold in your hand looks rather thin. So no, don't modify them, you'll lose strength in the bracket. Either take the time to pull the stub, and change your wheel bearings while you're at it. Or like stated above, sell them and get others, I would recommend a full kit. It's not exactly wise to mix and match on your brakes. Not worth the risk