cam wont fit

A ball hone will do just that (see above) only quicker.

Questions:

Did the machine shop have your cam when they installed the cam bearings?

Did you pay for just installation of the bearings?

Did you pay for the fitting of the cam bearings to YOUR cam?

Answer those, so the lynch mob can retreat.

PS it takes less time to hone/scrap and fit than to post on the internet....

Honing the bearing will likely remove the top layer of babbit, which is there for a reason. This is not the place for backyard fixes. As somebody already said, the shop should not have let the block go out the door until they made sure the cam fit.

When I was a machinist, I would not install cam bearings until the customer brought the cam to me to make sure that it fit and turned with no tight spots.