Ah, so you are arriving from Campinas–Viracopos and connecting to JetBlue. To my knowledge, as long as you are not carrying too much with you, you should have no problem connecting as where you're arriving into at FLL (Terminal 4) is linked to Terminal 3. However, you'll have to recheck your bags on the ticketing level of Terminal 3 on JetBlue, as your B6 flight is on another ticket. It seems a bit tight to me, but you should be fine IF everything goes according to plan (I.E. your VCP-FLL flight isn't delayed).

-LPDAL