Help with my first engine build (5.9 Magnum)

With the cam bearings, I bought the tool and like a surgeon meticulously installed the new bearings. Not a knick! Not a scratch! Go to slide the cam in and………NO! Won’t fit, magnums might be different, but LA’s have a reputation for cams not fitting with new bearings. You can have a skilled machinist “fix” the issue or you can do what a bunch of people, including me, do. You take an old cam core and slot the bearing surfaces on an angle with a cut off disc. Then lube it up and turn it as you push it in. Taking it out frequently and cleaning the grooves out. Repeat until it slides in and turns relatively easily. Made me want to puke, but works fine. Don’t sand bearings, it you see a high spot you can scrape it very carefully with a knife.