Need input...440 rebuild or not?

Bearing "crush" is what holds bearings in place and keeps them from spinning. Each bearing half is slightly longer than the rod or cap, main or cap that it is installed in. When the caps are torqued into place, the part of each bearing shell that "sticks out" comes in contact with each other and causes a "crush" effect, which forces the bearing halfs firmyl against the rods/caps, mains/caps and holds them firmly in place. That's what keeps bearings from spinning. And no, bearings are not round at all. Here is some good reading on the subject. they can, over time, lose the ability to maintain that crush. Also, there WERE "one crush" bearings made at one time, although I can find no info on them at the moment. This is a good read.

http://www.enginebuildermag.com/Article/68208/get_your_bearings.aspx