gates1580

I have the following itinerary coming up this coming saturday:

United 3405 Operated by: Continental Airlines
Depart MEX 5:50AM Arrive IAH 9:08AM

United 7240 Operated by: United Express/mesa Airlines
Depart IAH 10:10AM Arrive IAD 2:07PM

However, here are my concerns:
1. I have to clear immigration in IAH
2. I have to pick up my 1 check in bag, clear customs and check in the bag
3. I don't know which terminal United 3405 will arrive in and which terminal United 7240 will depart from. May be IAH hubbies can help me out here.

Given the itinerary and the constraints above, my question is - Is 1 hour enough time to make the connection (keep in mind i have a check in bag)?

If not, I have the option to change my flight to a direct flight from MEX to IAD which arrive at 3:20PM.