I should mention something else, I personally would run the engine with those marks as long as the rest of the work checks out. Because the amount of leakage those marks let by will be less than the ring gaps etc. But my concern would be EVERYTHING ELSE in there. The cam binds at times????? seriously I've worked on 100's of engines if I find something like that NO WAY would I pass it on to anyone without finding the issue. I think you need to seriously consider a better shop. I've been done this road so many times myself and I just don't think you will get what you want.

When I use a machine shop I ask how long is the wait time, If they don't say 3 weeks I find another. Good machine shops are jammed with work.

 

Keep in mind with the cam bearings that you don't get to adjust clearances like you can with main and rod bearings. Aftermarket cam bearings in the LS are often tight even when installed correctly. You can either take scotchbrite to the bearing or have the camshaft ground to the OD that gives you your desired clearance.

 

They installed 1 piece durabond cam bearings. He did mention he could take a little material off of the cam. I got nervous when he suggested that.

 

It's not the route I would suggest, but I've had to do it several times and it never seemed to cause any problems.

 

should I tell him to try a set of factory bearings? Those didn't seem to be a problem when I put the cam in the first time.

 

They say GM line hones the bearings after install. I don't know if that's true or not, but you might just end up in the same situation if it is.

I used a local crank grinder here in Houston to turn down my cam when I found it only had about .0005" clearance with the Durabond bearings. It was like $50 to do and he gave me .0025" clearance.

 

The one thing bad about them the material off the cam is if you decide to change cams you will have to do it again. The machine shop i dropped my motor off at asked for my old cam so he could get the cam bearings correct. He has built many LS motors and all other types of motors.

 

Its not much to resize the bearings in the block.