I really hate to get into somebody else's "rebuilt" engine, particularly one with problems. You have no idea what has been done correctly, or maybe hasn't been done at all. All of us have our own ideas of what a rebuild job consists of, and few of us can agree on what's acceptable in the way of tolerances and methods. Unless I do the work myself or commission it done to my standards by a competent machine shop that I trust to do things my way, I consider any engine I acquire to be a "rebuildable core" at best.
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!