BB chevy main bearings ?

[BlueOval Ralph]

If cross drilling and rod drilling is not done at the correct angle for the stroke it ( the cross drilling) will shut oilling to the rods at about 7600 and above.

Originally Posted by Mike Taylor 3601

1/2 or 3/4 either should be fine 3/4 groove will oil rod a little longer than half. Full groove will oil rod all the time,which is same thing cross drilling crank will do.
Mike Taylor 3601