283/350 main brg?

Pretty much as they come. I do check the slots where the bearing lock tang sits in the spacer. I sometime have to file the slot a little for the bearing to fit the way I like. I torque the main caps in place with the spacer bearings just to double check the bore to make sure there is not a problem. I then install the bearings and check my crank clearance. I've used several sets without any problems.