Hy amabolter, welcome, kingpin reaming is done with a special reamer setup so that you are reaming straight through both bushing bores. If you don't ream both bores inline then you have to ream at least one oversize so that the pin will go through. If you are reaming them properly, then as long as you have some bearing material left, and hopefully some grease channel, you should be good to go, hope that helps.
