At the start of a 400 mile trip home in our Versa quite a few years ago. Really didn't have any options so I added some stop leak and almost immediately the leak was sealed and we made it home just fine. Replaced the radiator shortly after but never had any adverse affects. Still going strong at 230k+ miles many many years later.
Not saying it's ideal for a performance vehicle but it does work. I'd try it in your situation in a heartbeat.