Stem bearing races

The bottom bearing on the steering stem was rusted out. I'm guessing the previous owner did not keep the bearing greased. Anyhow, I just picked up my pivot works OEM replacement bearing kit and although the bearing itself looks fine, it does not want to fit inside the old race. I put the old top bearing inside the new race and it does not fit together like it should. I'm guessing that I need to remove the old races as well. I have the bottom race which is rusted soaking in wd-40 to see if I can remove it. Anyone replaced races lately that can give me a few pointers on removal?. It has been eons since I changed out a stem race. Thanks

These appear to be OEM bearing. I was told (on here) that the integrated lip seal on these bearings allowed moisture by the seal. It collected on the bottm bearing. The fact that the bottom one was rusty in color told me that the race was going to be tough to remove, I may very well need that bfh....lol
Thanks for the tips.....:)