I had a machinist for along time do my machine work on quite a few engines, and never had a problem. Then one time on a particular 440 when I picked up the block he tells me to check the cam fit before I install the rotating assy, didn't say why. Got it home and sure as **** I couldn't get the cam in. He tells me to use a bearing knife to get it to fit , oil it and work it till it fits and loosen up. Long story short I took the block back and he put some new cam bearing in and the cam then fit fine. Had the same issue this past build on my /6, took it back to the shop (different shop down here in Florida did my /6 ) had them fix it. I think more often than not it's the shop not getting em in right the first time. Cam bearings are cheap. seized cam is not.
