RBS carries a complete line of Clevite bearings for your race engine. BAE #3 narrowed cam bearings are sold each and incorporates the strength of a copper-lead layer on a precision steel back and finally, a precision electroplated thin overlay of babbitt material only .0005' - .0008' thick.
Cam bearing uses a roll pin, measure 65mm each with one oil hole. The racer will need to purchase the roll pin separate.