SBE 318 basic rebuild +CAM , INTAKE, HEADS, expectations?

Hughes don't give advertised duration where's 280 coming from ?
It's a 224/228 cam on 111 but yes seems fairly aggressive more so than comps xe268h that's like a 224 cam to.
i guessed based off the @ 50 number that it would be in the mid/high 70's so that's close enough to 280 for me