now that i have some miles on the new combo and things are settling in i decided to see what the new stall converter and headers would do... nothing super special, but not too shabby for a stock 5.3 with long tubes, catted-y, a pypes muffler (LOUD), and a higher stall converter
(can't embed for some reason...)
http://youtu.be/UaLWwYzr7bc