Anything less than a total teardown and detail cleaning is really a gamble- - - -would you be interested in playing a little high stakes poker? I'm pretty sure you'd draw to an inside straight! The first thing to do is measure the crankshaft. If it's scored or out of round, bite the bullet and yank the engine out. There are two chances you might get by with a crankshaft cleanup with emery cloth and changing one rod, and those are slim and none!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!