That is the kind of engine I always looked for. But I would torque down a torque plate, and the main caps to spec and, using a good hone (Sunnen in my case) to just almost clean up the "waves" at the top of the cylinder when the piston reverses course. Good file to fit rings and you should be golden. Or do the best you can with a normal hone and get the OEM rings from
replicaracer43 see post #17, they are quality rings. As a matter of fact, I picked up an almost new looking 273 short block this summer to do this very thing.