Originally Posted by Global321

Risky.
On the positive side, that time of the year international flights into MIA typically arrive early and you will get a short connection orange card to go to the front of the line for customs. On the negative side, busy season in MIA, so expect full flights and long lines at security/customs.

Think of it this way... in the best case / worst case scenario... you land :00, then need to taxi to the gate, :10 - :20, then get off the plane and get to customs :05 - :15, clear customs :05 - :30, get to security :05 - :10, clear security :05 - :20 and walk to gate :05 - :20. So best case, from the time you touchdown to connecting gate is :30 minutes to 1:45. While 1:45 is unlikely, it happens.

So if everything is on time / early + no customs/security issues, you can make it. Any hiccups and you wont.