No the engine is 0.01" over rebored block with stock components. I'm sure it wasn't balanced. It appears to me that the line on the balancer is straight up withe the motor at top dead center. Vettes use a short water pump so I can't see the line. If I get someone the block numbers could they tell me what the motor was out of? I bet it was a pickup motor. What a pain in the behind. Live and learn. I wish I'd just put in a crate engine.

http://home.swbell.net/jsbukaty/corvette/corvette.html