Mexico - GDL Transfer

Looking at booking two separate itineraries one PVR – GDL with AM, then GDL – IAH – BOS with CO. The connections are tight though with 30 min in GDL and 93 min in IAH. I think I will have to switch terminals possibly check-in again in GDL, any advice? Is this doable? As long as customs and immigration goes quick in IAH I think I should be good there???

Need to be in BOS by 19:00 if anyone knows a better way?

Thanks