Torque Converter / performance
 

I am looking to upgrade my torque converter on my 2007 1500 suburban. stock engine 5.3. 4l60e built to hold up roughly 500 hp with problem solver and shift kit with corvette servo. trans works amazing after i rebuilt it. looking for a better torque converter for better fuel economy and performance. in near future will be running roughly 420 hp. any suggestions. thank you for your time