Probably over-carbonated when it's all said and done. Well, depending on what CO2 volumes level that much priming solution will give you (depends on the temperature of the beer and such). BTW, it's also far better to use weight whenever you're measuring for priming solutions (for the sugar source). Volume measures are notoriously inaccurate in comparison.
If you're setup for it, you could vent the keg periodically, while it's carbonating. With a ball lock keg, that would be easy/safe. With the sanke, you'll probably need to attach a coupler to it, and use the gas side to vent. Although it might not allow you to do that as they're built (to prevent gas from going out of the keg when not connected to a CO2 tank).
I ferment in sanke kegs, but serve from ball lock kegs. You might want to consider going that route.