Played with the Corvette today - its chinese block was stuffed as well - grumbly bearing and badly scored.
So off it came and on went one I was given december last year - apparently it was honed and re-ringed 12 months before the steel deck gave out
Haven't played with the carby yet, or put on a nice cover, but put some fuel in, new filter, some oil down the plug hole, and it went first pull. Poor throttle control though