The 160 degree t-stat would have been my first recommendation, but since you do that let it get up into the higher degree range and use your SCT to monitor the ect. Once it gets into that range check your fan...see if the high speed is actually on. (may have a blown fuse...relay) Open the cap to make sure the water is flowing at that higher temp as well. I would personally switch to the 2010 radiator hoses since the 05 hoses were a mess on my old procharger setup and caused mine to have tons of excess heat.
Stupid question but you have 50/50 antifreeze in the system and not straight antifreeze correct? Since you live in texas you could actually get away with Distilled water and 50/50 antifreeze mixed equally. That would help.
The last thought is that your A/C is either overcharged or under charged throwing enormous amounts of heat into the ac condenser which is right in front of your radiator...thus causing tons of excess heat to be pulled through your radiator.