replacing cam bearings?

So I went to the local advanced auto parts, they don't rent the tool. I went to my local chivy machine shop. $30.00 plus bearings and rear cap for $2.00. Great that is cheap enough. He says bring him the bare block? I said why. He says you can not line up the oiling hole with the hole in the bearing unless the crank is out. What?? It's in plain view with the intake off. He was giving me 350 this 383.440 this. The end result; He won't do it unless the crank is out. Am I missing something???