I know that there seem to be quite a few threads about this already, but I'd be grateful for a few opinions on this...

We're arriving on the BA flight in GRU that will land at 5:20am if it arrives on time. We're hoping to go onwards to IGU (Foz do Iguaçu) straightaway. There is a flight at 9:00am which we were hoping to book. Is it feasible that we could clear immigration, get our luggage, clear customs, get from T3 to T2 (where I gather domestic TAM flights leave) and check-in for the 9:00am flight on time?

Your input is appreciated!