the thing is ..you may get the bearing's and crank to bolt up and even seem like its spinning freely..but whats gonna happen is excessive bearing wear ..and a good chance that heat spots could form on a certain spot on the bearing that is wearing faster and could cause a bearing to spin,,messing up much stuff....
the studs pull the mains down so tight..the mains go from being ROUND to OVAL shape..sometime hard to see by the human eye, but sometime you can see it if you know what your looking for.....but you put a MIC on i and you can see the distortion no problem....the align hone process is fairly simple..some can do it at home with right tools...but if you have to get it done i would say $80 to $150 (high end) would get the job done for you..(standard shop labor)
the biggest thing is getting your motor tore down to that point..if your there already then great...less hassle.
glad we could help.
Brian