Maybe some dye on the area and rub a bearing across it to check or partial bearing with emery cloth lightly.The oil hole is drilled from the crank to the cam so why it is raised idk.
ps:the bearing is black for 3/4" on both sides of the oil hole with some along the 3/4 groove on the trailing edge.[fyi]

Last edited by Clanton; 05/23/17 08:19 PM.
GOTBOOST!New improved with Victor heads.
http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/