Early Chevy V8 oiling,55-56 265 rear cam journal,at least notched,57-2001,no notch or groove needed.All W engines,rear grove.65-66 Mark IV,rear grove or notch needed at the rear of the cam.67-end of production,no groove or notch needed.
Be very careful w/ the Scat crank on the rod throws ... The radius is quite a bit larger and you may need to use a narrow bearing ... I learned that last year when i did a 348 / 438 for a customer !!