I just resently spun two rod bearings in my 355 and was wondering if there is a set time periode that anyone uses to rebuild the bottom end on a high performance engine. Something that gets run hard for a long time like a circle track motor or maybe a drag racer. Now i didnt put special race bearings in this motor. They were just auto parts special federal mogule's. And would a race bearing last longer. Youd think so ,they are made for that.