If you're referring tome, it's going, but slow. I only work on it about once a week due to a pretty busy life. Now that winter's coming and no garage...
As of now, I have the old engine/ trans out, the dash out, working on the clutch master cylinder, and the modified trans crossmember. I still have to 'refresh' the engine and have all the stuff, but that won't be until spring. I plan on dropping the engine in during winter for mock up.
Most of the issues have a solution that I've either bought or are waiting to buy. The only real snag right now is the fuel system. I want to install a fuel cell, but for the C3's stock location is a bit on an oddball size in the fuel cell world. I don't want to cut the body or any major frame components. I still have some stuff to figure out with the harness (I know very little about wiring), but that's what I'll be working on over the winter.
If you're thinking C3, I would think twice. They tend to be high maintenance in themselves. The swap is much more straight forward than most, but the car can suck you dry. There really aren't too many swap specific parts for the C3 either, but you don't need many (modify the water pump, an '85 1 ton truck clutch MC or Z bar, some sort of trans x member solution, etc). I would go to a corvette forum and check out the problems a C3 will have. They can be annoying and an absolute b!tch to paint. But you won't find another car like it. It's a very tortured love/hate relationship, haha.
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Currently working on a LS1/T56 swap into a '75 corvette. | 
