Were the rods reconditioned when the engine was assembled? A round crankshaft journal and an egg-shaped big end on a rod don't play well together, but the result is usually too much clearance, not a tight fit. Rods usually get stretched top to bottom. I recondition the rods on everything I build. It's just part of a good overhaul.
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!