Is line boring an engine block necessary? or should you just

Is line boring an engine block necessary? or should you just replace the bearings ?
I recently got a engine block that looks great, 60k on it but I bought a new crankshaft, and upgraded engine parts. MY friend is telling me I do not have to get the block line bored, but to just replace the bearings.is that going to be a problem? new pistons, rings, seals, and crankshaft.used block. Of course I'll get the cylinders done but is the major bearing re bore necessary????thx

A good machinist can check the crank bearing bore for alignment with a straight edge. You may also tell when disassembling an engine by looking at the present bearings and their wear pattern. If the block is straight line boring is a waste of money and a possible new supply of problems if it's done incorrectly.

If you still have the bearings marked, line them up and look at the wear, if not have the block checked by an experienced machinist who already has lots of work.

Not generally but many times line boring is an upsale for shops looking for more profits. It is not needed frequently.

I could get it done just to be on the safe side and to be sure everything is true. An once of prevention...

if you're going to use it for racing, or a very high rpm application, then I could line bore it, if its just going in a street car, then I would not annoy..

just me is dead on...
extreme rpm.do it.
standard build.$ wasted unless there was a prob

if its in specifications I wouldnt get it line honed. a machnist once told me that the only time the is really necissary is either A. it's out of tolerances, or B. You have new major caps installed