The block itself is in good shape, what you would need is a crank shaft. which comes with a bearing kit. Personally i have worked on a dsm 2.0 engine that turned a main, a 4.3 turn a main, and another small block turn a main, i run a new crank kit and ive never had a problem with any of them. That's how i do it, riverview reccomends line boring, thats what he reccomends, im not one to go against that. None of the blocks i worked on were bad enough to have line bored, and personally i dont think this one is either.